I played with A.I. twice so far, still didnt really get to see what he could do because I was focused on winning....tried his crossover once but didnt get it like I wanted.
The guy that quit didnt want to try the card more because he prob pulled him many times already. Also, nothing really to try with those Diamonds if you have played with the silver versions of them already. Basically them on steroids. However I do find lots of players I like in Gauntlet, like I played with 6man Barbosa...now thats one of the next cards I am going to get.