Speaking for PVE only, but I've been loving the Mechanist Elite as soon as I started playing it. It seems the most well done of all the EoD elites. I love the different configurable roles for the mech, which help keeps it fresh. It's a nice touch that it does damage when you respawn it at the start of combat.. The mech was so interesting I didn't even bother with the mace until recently. I haven't had many problems with the AI, but I haven't been using it in a support role.