Ranger
Laezel
Shadowheart
Wyll
Halsin (who I asked to accompany me)

Found the fight quite easy, however there are several factors.
1. I came from killing the Drow - The goblins outside of his chamber where there is a guy who I suppose is supposed to be pushed into the pit below, he just stood there and the Goblins I killed without intervention from the neighbouring room.
2. Wyll could target the Goblin mage through the gaps in the wall as you cross the bridge (where dude stands complaining about needing a sword), so that was the end of him.
3. Didn't go through door, all ran over bridge and through the far entry point. Goblin leader ran over to me and I could attack him with all 5 of my party and he died pretty quickly. I thn just had to mop up the rest.

So it is possible that apart from the extra pair of hands (Halsin), the area was bugged and I was fortunate to profit.