i also need help with Lambach at ACT 2 :(
I get ripped by the 2nd Phase of the Boss :(
Sorry to overcome this Post...

cMoStWanteD.8995 is my Nick thanks for everyone which will help me out.

Hi

Have same issue with Magic user I got my Ranger through the whole story no issues but Warrior and Mage suck on these bosses so damn hard tried my best to change the skills around but so far no luck. Any help would be great :)

Act II boss is the hardest one in Game.
If you do Act III Boss do the first two Parts. In Thirds Part you will find a magical white Aura, get in there an start your Apokalyptic Form. After I did this I get much support from the other Angel and Beat ACT III Boss in few Seconds.

I do play a Battlemage, so i can run away from Boss, punish it with Lightningsspells and Firehammer, do a Jump into it, IceAura, Bulwark of Dawn and Baäphmets Chains as long as possible. Then again. I do it in Part III and 1 second before I die i was under the Shield and go in Apokalyptic Angel Form. With this i beat Phase 3 with the rest of my strenght very fast.
Give it a try.