Slate Ridge Mauler might be a good one to take in Turf war. Impossible to Wound so there's a - flip to damage against him, and sonnia can never cheat even if she makes it a straight flip. Also Hard to Kill, Bearskin Armor, and a trigger to heal. In fact, he was originally designed as a Showgirl model, sort of a dancing bear with a little circus outfit and a fez. Check out pg 31-32 of Wyrd Chronicles #4.
Mech Rider is just generally awesome, summoning models is something that any master can make use out of, and Colette can Prompt it for an extra push + attack or push + move. So she makes an already awesome model... awesomer.