[quote name='MSUHitman']What party do you have in Golems? Is it your original group or just a bunch of dwarves?[/QUOTE]
The latter plus a Golem and an NPC Bronto. It's the standard "f*ck you" package; a garbage assortment of new but relatively useless characters: Jerrik Dace (Dual-Wielding Ranger Duelist), his terrified brother Brogan (Berserker Reaver), their mascot played by an NPC Bronto and one hell of a joke Golem (it has Chain Lightning for f*ck sake - it's essentially your makeshift automated mage).
Oh, and you have to search for more scrolls to 'upgrade' the golem's abilities. All of their stats are intentionally screwed up e.g. you can't tank with the golem because its stats are tied into Willpower and Magic. They also provide you with one respec tome to use with YOUR Warden for the Harvester fight (trust me you WILL use it when going for the achievement).
Arcane Warrior/Blood Mages won't have that much of a problem with him nor his peanut gallery. Everyone else is more or less screwed for a while until enough trial and error or running for their lives leads them to victory. I lost count of how many times I died before I said

it (after experimenting with damn near every build and idea I thought of) and went for psuedo-AW/BM build on my first canon mage focusing on Harvester alone trading in AOW spells for good ol' fashion raw continuous dmg (curses, hexes, crushing prison, etc.).
The boss itself is an utter joke. One on one anyone could take him. It's the near endless supply of Elite and Ultra Hyper Combo using horde of Skeletons it spawns and keeps ON spawning that will drive you to the brink of insanity. Don't bother reviving anyone and just focus on survival and Harvester. Those clowns won't survive long regardless of how much time you've spent babysitting or the amount of dedication you put into fixing the damage done by the devs.
Good luck if you plan to hunt for the achievement. Otherwise this is one DLC you won't regret passing up. Trust me.