Board Thread:Event Help/@comment-32555992-20170813110647/@comment-33728484-20170813130159

You can still use Hyper Meta-Rilldo, don't worry about his SA. At least he's STR, which means that he gets the boost from the two Grandpa Gohan leaders, and he also has type advantage. And you can get Frieza every Sunday, which is today!

So, assuming you already have Grandpa Gohan, Trunks and Cyborg Tao, you'd only need one non-STR character. Why not Tien? He's AGL and he won't get the Leader Skill boost, but he can stun without super attacking. Or maybe Paikuhan, as a support unit to make the others stronger. Or both, if you don't manage to get Frieza. Just be sure to put them always in the third slot, so that they won't appear too often.

P.S. did you get Bulma from the Mr. Right event? She's pretty good, she's both a healer and a tank.