Well, full additional is definitely the way to go, no doubt about that. But what's the secondary effect you'd be buffing? Crit is basically useless on him, since he's practically doing guaranteed crits in slot 1 when he's intro is up, and even when it's not he could easily still crit on every single attack. That would lead you to think about going dodge, but since Gohan takes no damage anywhere(one shot bosses excluded, even though he might actually survive some even on regular turns lol) even without his active up, it wouldn't help much either. Thing is, because Gohan gets extra 20% attack(and crit, which is relevant after his intro is gone) per attack received within the turn with no limit, dodging an attack before he attacks, most of the times even a super attack, would hurt him.

I honestly think that even if Gohan had his crit chance from his intro at all times, crit would still be the way to go on him.

Edit: when I say building him is weird, I don't mean it's hard. Beast is the one unit where there's only one correct build, and it's quite obvious. It's just that beast literally makes 2 types of HiPo abilities irrelevant on him, and he's the first unit to ever do that

Gohan, IMO, is the first unit to ever make dodge useless. Even ssj4 Goku, who is Hurt very very badly by dodging, could still 5 dodge a super that would kill him.

Gohan is weird to build, but in the end, he's the absolute best no matter how you build him(hell, you don't even have to build him. Dupes mostly just give him more attack and hp).

At this point, I'm also starting to reflect back on when people said accounts that didn't have str Gogeta were shit because he made everything so easy. Gohan literally is just shitting on all content, by himself. If he isn't #1 in history, he's definitely #2