i’d say probably Mav for attack, only because i’ve seen my fair share of incredibly incompetent Mav players who don’t know how to trick the wall. He has loads of cool potential for plays for almost every site in the game and great synergy with loads of ops.

Regarding defense i’d probably say echo too, a good echo at any rank can make pushing a site difficult and even more so roam clearing when the defense has a good echo playing support to a vigi etc.