um on the part where I have to do turn in to a seeker and it spawns a plastic priest that aoes. I'm reading mixed reviews but will his aoe aggro the other mobs in room?
Nah. You can safely pull him to zone. I spawned and didn't even look back. Just ran for it to the zone. He'll make his way to your group at the zone in.
You can also just kill him in his room. The other mobs won't aggro him or bother you, even if he casts an AE.
I think that's how most people do it, yes. You're likely fine to kill him with the trio above. He's got a bit of MR, so landing slow might take a few tries, but there are a few mid-40's NPCs you could likely charm if you're worried about keeping the necro pet up.