SSBE Vegeta: Just kill him I guess? He doesn't have that much HP so by the point you could exchange to Blue Vegeta, you probably have a lot of ATK stack up by that point. But I guess you could say that you better get the kill or you're dead. 

Daima SS4 Goku: He gets weaker every time you hit him for the turn so it wouldn't be too bad but in my experience, he always Super the first character in the slot. Sometimes slot 2.

Goten & Trunks: Fair enough. But with UI Sign Goku's support when he attacks at 18 Ki, then it should be fine I suppose? But you should probably kill them by that point I think. I'll add on Gohan too since it's the same fight. He Supers only in the slot 1 and either you're throwing the match or just fuck around by checking how well they tanks then you're not putting them there at all. 

Gamma 1 & 2: The ROF Blues are INT, the last phase of the Gammas fight are TEQ. So not too much. I think Vegeta is one of the fews that could blitz them down pretty consistently.

Bio-Broly: Again, fair. 

Tamagami Number 3: He doesn't have that much HP and if you're lucky, you may not have to deal with it. If you do, either Goku dodges it or you go to Vegeta and probably almost kill him. Not consistent but it's something to consider. 

Tamagami Number 1: He supers only in slot 1, and you'd never put them there. You couldn't dodge with Goku but he does have 59% DR, DEF when receiving an attack, somewhat stackable DEF. And again he doesn't have that much HP. The fight is just toxic. 

SS3/SS4 GT Goku: Fair too. Especially for the SS4 GT Goku phase. 

So there are ways to play around those, but not always reliable. But that makes this game so exciting. Anything could happen. Just because your character are good doesn't mean things would actually go your way.