Btw, classing them in power-
Wredd's master is probably mid to even high council level.
Yalta Val's like mid council. Luft, low to mid.
Wredd, low council (though growing)
Jao, likely starts at mid master but definitely grows a few steps during the series.
Infiltrators, from low knight to mid master.
Trainees, high padawan I'd guess. They were supposed to be combat ready.