Noob questions

I have a Ele/Mo lvl 19 and I have a few questions

First this is my first time through any campaign.
I have all three campaigns but not eotn. Currently I am done doing all three asenssion quest.

1. I am sucking when it comes to the dopplegangor part. Any suggestions would be awesome

2. What is my best best for armor right now, I've started to collect some prices to trade in desert area for the lvl 60 stuff is there better within reach?

3. How do I get elite skills?

4. Will I always be a glass cannon as a fire Ele? It seems my monk second is kinda useless, any recomendations once I assend?

Any help will be great links are appreciated as well.
Thanks

Look at the wiki page on it, "guide to defeating the doppelganger" should find you the page. It has advice for all professions.
Generally, what you need to do is make better use of skills than the doppelganger. Equip mostly bad skills, so he wastes time casting them, while you use a good one. Equip skills that exhaust, so he shuts himself down.
Quoting from the wiki for the elementalist:
Elementalist armor maxes out at 60. While you can improve it a bit by adding insignia, the baseline will remain 60.

First, get a "signet of capture" skill from a skill trainer or a quest giver in Lion's arch. Equip it on your skillbar. Then, kill a boss with the elite skill you want. Activate the signet of capture over his dead body, and select the skill you want from the menu that pops up.

Elementalists can get several skills in the earth magic line that make them excellent tanks. However, GW is not really a tanking game. Also, if you want to be a strong damage dealer, you'd better equp those skills and stay at the back of the group.

There is a way you can get max armor (60AL) now without collecting all that stuff. Go to Lion's Arch and you'll see a couple of announcements pop up about how to access Factions and Nightfall. Follow the instructions for getting to factions (there's a quest). Just follow the quest and you'll end up in Kaineng Center - where there ar three armoror who craft max armor.

Again, in Lion's Arch talk to Magi Malaquire. He's got a quest that tells you how to capture Elite skills from bosses. He'll even give you a Signet of Capture to get you going.

One more thing - While you're in the Desert, there's a quest that will give you 15 attribute points: http://wiki.guildwars.com/wiki/Sariss_Yassith And there's another attribute point quest you get from Vanyi in Droknar's Forge.

I'll address only this. No you won't. You can switch and do different types of play. See here: http://pvx.wikia.com/wiki/Special:PrefixIndex/Build:E/

Find a build you can create with the 3 base campaigns (or just buy EotN since it's pretty cheap I think right now) and one that you enjoy playing. Have fun.

@Doppelganger: Do you have Iron Mist? It's a totally useless hex spell that makes the enemy move 90% slower but immune to all damage except lightning damage. With this skill in the Bar the Doppelganger will protect you (15/30s uptime).
Bringing a bunch of fire skills to deal damage and Iron Mist (don't waste points in earth magic for that - but the Doppelganger has all attributes at 12) should do the job.
tbh, I've never tried that - I killed the Doppelganger as E/Me with Earth Armor and Empathy

With /Monk you can bring retribution and let him attack you. I don't know if it still works, but there was a time when the double wouldn't use regen healing spells when taking damage. So you could bring healing breeze. Lately I've either been Necro or Beastmaster, so haven't tried Monk tricks.

Thanks for being helpful!
You guys are awesome

A bunch of enchants,iron mist, and flare spam, dead in less than 30 sec, thanks again