(I do not know how to report bug 3 : what information do you need ?)
I'm trioing (is this a correct word ?) with my evil-aligned entropist PC, Korgan and Valen : they do a very good job together. However, Vampire Hunters come as I am in Nalia's Castle (the biggest room in the center of the first level). While here, I noticed several things :
1) (minor bug

) Valen destroy trolls before Korgan and they disappear completely (My game is paused automatically when opponent is destroyed) for a short period of time. Then, they appear again, falling, and you have to use Acid or Fire to kill them. What is strange is the short period of time without troll : is it fixable ?
2) (question :huh:) Since the time I took Valen in my team, I had no difficulties to crush any ennemy (I've done every Akhthala quests, Asylum and Trademeet) with my three characters. But when hunters are coming (at Nalia's Castle), they seem really overpowered compared to the other kind of ennemies i've already fought. Don't you think the challenge is a bit difficult (especially when you only have two characters trying to protect the third who is attacked by six powerful opponents) ?
3) (bug ?

) Valen is killed while in mist form by hunters : she is not destroyed.