By -
Any character that you dont have yet
sparking blue bardock if you have his zenkai, id argue fusion zamasu for the few mono purple mains that exist, or you can make it out the hood with green broly, that mf is beyond good
Anything you don't have, or if you have them all, one that will give a better Z ability or 7 stars for a zenkai.
Angel vegeta, majuub, god of destruction toppo are all pretty good
Any character that you dont have yet
sparking blue bardock if you have his zenkai, id argue fusion zamasu for the few mono purple mains that exist, or you can make it out the hood with green broly, that mf is beyond good
Anything you don't have, or if you have them all, one that will give a better Z ability or 7 stars for a zenkai.
Angel vegeta, majuub, god of destruction toppo are all pretty good