Yeah, and I always overestimate their survivability.
I had a random setup where every starting location (me and the AIs) all started with a free commander from the unit list and Magic 4 items. Start with a vastness, demon lord, or pretender chassis and then sometimes start with a slinger or militia. Obviously I'd restart until I got something fun
A lot of the good chassis still need basic equipment for great surviveability - even con 2 stuff will do wonders.
Although the AI grabbed a seraph once, even naked that thing was brutal.