Do you change builds for different missions?

Depends on which character I`m playing:

Ranger - set build for almost every area in all chapters
Warrior - same as above
Assasin - same as above
Necro - MM or SS set builds
Ele - Nuker = fire, Spiker = Air, Tanking/Nuker = Earth, Hexer = Water, all set builds
Monk - Boon/Prot set build and don`t like making changes as I mess up when I do
Mesmer - always changing it
Paragon - given that up for now but was a set build
Dervish - set but about to change it (work in progress)
Rit - set but keep tweaking due to updates

In general I will only change 1 or 2 skills due to certain bosses in a mission or area, ie. Unwaking Waters and interupts or The Drought and prot spirit etc..

Ele: Sometimes I put power drain on my SF heroes(or my ele) to ease the pain of the deep freezes from the rains of torment or for the 140% energy area.

Necro: For Death I use order of undeath when mobs can't one-shot the minions(torment) and I use jagged bones otherwise. For curses I use SS of course, but sub in mark of pain and/or barbs if there's a MM on my team. Double defile enchantments for areas with madness titans/dervish enchantment-heavy mobs. For Blood it's pretty much always spoil victor. This is pretty useful if your party is constantly in danger of dying and your enemies strike multiple foes. This works well in torment where the mobs use barrage and hundred blades. The torment rangers Barrage, take 600 damage and then immediately troll unguent. Heh.

Monk: ZB + LoD with the occasional ZB + LoD + Divert Hexes for hex heavy areas(torment).

In short, pretty much the same build throughout nightfall except torment.

Really depends on the mission/area I'm in. Considering I have already created 20+ templates for my chars, it's getting pretty silly. My mesmer alone has 8 templates of different skills.

I try to develop 5 or more builds for the character I'm playing. Then I run whatever builds suits my mood or an experimental build unless I know the area requires some specific build.

If I get walloped I won't go back in the with the same build.

Also, the builds that my heroes use will change depending on the build I'm using (esp w para or rit).

I proly have 25+ builds saved for my para alone - motiv, command, axe, scythe, bow, spear, pet, anthem heavy, caster support, warder, spirits, SF, evasion, etc.

like most people it depends;

ele - pretty much set, usually just 1 skill change depending on the rest of the party, if they want me to be anything else but fire nuking i just throw a build together on the spot.
monk - constantly adjusting to suit wherever we're headed for and to complement what the other monk is running. has about 5 templates with blank spots to fill in.
necro and ranger - pretty much switch between set cookie cutter builds >.>;;; though sometimes switching a skill or two to suit the party's needs.

the rest of my chars i either don't play enough to know what's best yet or they're barely into the game and so don't really have a great skill selection.

golly. I have 15 different templates on my ranger alone--and I use them all, depending on the mission and/or quest and/or explorable area.
For just questing and goofing, I like my pet/condition builds; for some missions I go heavy on interrupts; for others I have ineptitude or ebon dust.
It all depends on the enemy, and how useful a particular skill set will be.

The same holds for my other characters. I have a rit, and the build changes depending entirely on the needs of the party, in this case: am I the 2nd monk? or a spirit-spamming damage dealer? or a protector and disrupter, with shelter, union, dissonance, and weapon spells?

So, yeah, I change builds all the time. And I'm still learning!

I tweak my builds sometimes but I don't make huge changes time after time.

One thing that does annoy me about some people is that they ask to see your build and then ask you to change 3 or 4 skills. I sometimes will mention that a particular skill is useful for a specific mission but it's up to the player to choose the build.

And I won't change my smiting monk to be a healer just because someone needs a healer. I've got a healer monk but go fed up of being complained at when I couldn't heal some idiot who wouldn't let me regen.

I have about 50 perfectly tweaked paragon builds and i ALWAYS changed to counter everything th mission would bring me. Now I have a couple builds that are very effective in PvP that can counter a lot of build-types. So changing your build every mission can really help a PvP player.

My ranger runs more than two dozen different builds; I have a "general purpose" build used for most PvE, but I play several specialized builds depending on enemies and the "fun factor".

But she *always* runs with her Dune Lizard, because that is part of her character. Alanora without a Dune Lizard is like Luke Skywalker without a light saber.

My necro is more flexible, although she only runs minions in *very* limited circumstances (as in Vizunah Square). She has about a half-dozen Curses based builds, and will swap them out depending on circumstances. If I'm killing Shiro, I bring a Spoil Victor build, for example; if targets tend to clump, I bring Spiteful Spirit.

Enjoy the game how you will.

PvE soloing, yes.

PvE max party in most missions, no.

PvE max party in elite/endgame missions, yes.

I always play with the build I like more by profession. BUT, if I fail the mission, I change everything thinking in my fault and/or mission dangers, that way I normally have success the second time.

yes,

some skill sets just dont work well in some areas.

taking a mm to a djinn area-----no bodies, hence no minions.

going up against margonites....I bring lightbringers gaze, no reason to have it when I am beating up on hekets.

my mesmers (as has been mentioned) seem to change the most. Some enemies just need some empathy while others need to be interupted.....and sometimes my me/r likes to play with her pet crab.....just depends on the ai. My illusionist/channeler seems to change her illusion skills alot as well, but not the rits ones.

my rit has changed the least...but with the updates I will have to go back and see whats changed (have 8 toons I regualarly play and she is not up yet).

my smiter seems to use the same smiting skills but changes his secondary skills aroound (necro) as the area fits (either blood or curses, he is not an effective mm).

my heros change as need be.......like my rangers go from interupters to trappers....my eles change from water to fire, etc....while my monks and warriors (includes sin, paragon, and dervish) dont change at all.

As some of the others in this post have said it truly depends upon the mission. In certian issions in Tyia some builds worked better than others and changing your build to make it a bit easier to do said mission is only smart. A couple missions that come to ind are on the Fire Islands. Most of the monsters are either resistant or imune to fire skills, so you will find players wanting a ranger with winter. Why winter, it causes all skills to be cold based no matter what their main attribute is. So a nuker can go in with his most powerful fire skills and still be effective in combat. I have on occasions changed my skillset to whatever the situation calls for. This gives you the chance to see what other skills can do and gives you something to fall back on if needed.

Mega Mouse

hehe i don't switch at all. I run my w/mo with mending and everything and it gets me from start to finish for every mission.

I dont...ss works for almost anything, anywhere

but I might get into it soon since now the save and load skill bar is in.

Sometimes. Its usually when I get stuck at a mission. Like now I'm experimenting with builds for Dzagonur Bastion. My 3 MM strategy did ok the last time but Olias got swarmed at the Eastern Bombard and MoW wasn't in the right place at the Eastern Bombard.

i change my Necro's and my ele's skills almost every time i enter a town
i dont change the skills on my dervish to often though.

I think it depends on the type of build.

I usually have a 'core' build for all my characters, then switch it around a bit if necessary. Some chars, like my monk, have several 'core' builds which I switch to whenever they become useful. Healing/Active prot/bonding etc etc.

Most of my builds get little tweaks from time to time, especially if there's a strong theme in the area I'm about to face - Dasha Vestibule is where all the heroes put on mantra of flame and assorted interrupts, siege missions mean renew life instead of rebirth on HB monks, Shiro gets some wild blow action, that sort of thing. I have a specific monk template just for Abaddon. But most of the time I have a core of 5 or 6 skills that never leave my bar.

I always consider the upcoming area situations, and change my build accordingly.