500 point team featuring a pair of rivals, who are allowed to use mastermind to target each other regardless of keyword or point value. How does this team look?

SWB #061 Black Panther: 150 Pts (Rival 1)

SWB #029 Erik Killmonger: 50 pts (Rival 2)

CWSOP #113 Captain Ironmerica: 175pts

SWB #31 Alex Wilder: 25 pts

AI #048 Starfox: 80 pts

Debating what I should do with the last 20 pts, I have characters like BTAS #007 Leslie Thompkins and some TMNT foot soldiers that could potentially fill 15 points plus a 5 point BTAS Christmas present. I'm fairly limited on pieces but I kinda like the core of this team, I just wanna know what to do with the last 20 points and if the core is worth giving a shot to