I tried something the other day just too see how it would go. A Warrior can kill the doppleganger in less than 50 seconds now with only 2 skills.

Shield Stance and Deadly Reposte.

The warrior was possibly the easiest to kill but now it's just rediculous. It's rather sad now all it takes is 2 skills.

The technique if your wondering is :

Max your Tactics before goin in. no need for any other skill lvl's

Once in, get into melee range

Cast Shield Stance

Keep casting Deadly Reposte when it regen's

If you do not take any other skills with you and do not hit him he will die in around 40 seconds depending on how high you can get tactics. In my tests he is always dead before Shield Stance regenerates (45secs).

Im surprised that Anet doesnt nerf the fight between warriors and their mirrors. Theyve nerfed every other advantage I can think of, yet its still incredibly easy to kill your mirror if you are a warrior. (even without this new strategy).

Of course, now that I say this, they probably will. lol

if you have a warrior as your prim or secondary, just pop in frenzy. I dont know how quickly this kills them but its now even quicker with your strat combined

Yeah i originally killed him with frenzy. It took about 30 seconds if i remember rightly, it was a long time ago though. I just wanted to point out how stupidly easy this method was with only 2 skills and you don't even need to hit him.

Saying that reminded me to try something so i took Gladiators Defence, Sheild Stance, Flurry and Frenzy and he died in 11 seconds without me landing a blow to him

That's so complicated :P When I ascended with my warrior I just whacked him with the basic sword adrenaline skills, later i tried it with Battle Rage and got under 10 secs I think, close to it at least.

Imagine how both riposte skills, a 75% stance AND frenzy would work against the doppleganger! I just did it with some hammer skills though.