Best IAS?

Ok. Well, I've gotten pretty comfortable using enraging charge and flail. From what I've read, I need to get dragon slash. Not only does it look like a solid attack, but the adrenaline gain is great.

Just as a general comment, (and I know I've asked a lot of you folks), do you find axes to be better than swords? I have a few axe elites unlocked, and was previously using one until I got this cool gold sword which I'm using now...

Thank again. i think sword is a more constant dps and good pressure but axe is more of spike damage

dragonslash just owns in this role No, Dragonslash gets caught on a Guardian or Aegis and you fail miserably as your adrenaline engine is neutered.
Block is far too prevalent to rely on DS in any serious PvP.

Just as an update, I picked up dragon slash at the Boreas Seabed mission, and while it certainly is a nice skill, it just doesn't seem to be "all that". In a perfect world, DS is knock-your-socks-off amazing.
An example of this perfect world would be the Master of Damage on Battle Isle, where DS shines brighter than the sun.

Then you go out into the "real" world, and you get a healthy does of reality: target switching, crippled, kiting, block, blind, hexes, interrupts, etc. Then you start to realize that DS is about as flexible as a steel I-beam.

Half the time, DS still works. And let me tell you, when it works, boy does it work.
But the other half of the time you'll spend fumbling around the battlefield like a rookie quarterback when things such as the above-listed start to rain on your perfect world parade.

Still, the argument for running a DS build has gotten stronger with the advent of PvE skills such as Save Yourselves and now Brawling Headbutt. So you would have a very strong argument if you stated that the advantages of a DS build outweigh the disadvantages.
But there are many situations where a DS build just won't be able to maintain the adrenaline chain needed to make it work. Eye of the North, in particular, has caused many players I know to switch back Triple Chop builds.

Personally, I run hot and cold when it comes to DS. I find myself switching back and forth between DS and Triple Chop on an extremely frequent basis. When I run the Triple Chop build and then run into a situation where I know the DS build would shine like crazy, I kick myself for not having the DS build at that exact moment, because I know I'm not doing as much damage as I could.
When I run my DS build and then run into a situation with heavy blind/block/hex/whatever and DS starts failing miserably, I kick myself for taking the DS build over the more stable and reliable Triple Chop build, because I know I'm not doing as much damage as I could.
I try to pick the build based on the area, but there's bound to always be a situation or two (and sometimes many) like the ones I just described above.
Oh well, I guess you can't have 100% efficiency all the time.

Sorry to get off-topic there.
On topic: I always go with Flail in PvE. Always.

Then you go out into the "real" world, and you get a healthy does of reality: target switching, crippled, kiting, block, blind, hexes, interrupts, etc. Most of those are irrelevant in PvE except for block, in which case you wail on something else instead.

I usually don't run Triple Chop as it requires me to stand in the precise spot in which several enemies are adjacent to me. Those spots aren't as frequent as I'd like them to be, and having to position myself is a waste of time, especially with Flail up. I'd rather Brawling Headbutt an annoying caster and let the rest of my party deal with everyone else.

You should try bringing "For Great Justice!" and Sun and Moon Slash. If you have GWEN, get Brawling Headbutt and Steelfang Slash. Power Attack and Counterattack aren't particularly useful. I don't have GWEN... yet. I don't like how long the recharge is "For Great Justice". I do have sun and moon slash, though. I'll have to give that combo a try. Thanks.

Most of those are irrelevant in PvE except for block, in which case you wail on something else instead.

I usually don't run Triple Chop as it requires me to stand in the precise spot in which several enemies are adjacent to me. Those spots aren't as frequent as I'd like them to be, and having to position myself is a waste of time, especially with Flail up. I'd rather Brawling Headbutt an annoying caster and let the rest of my party deal with everyone else. You never see crippled, kiting, block, blind, hexes, interrupts? What area of the game is this and how do I access it?