I ended up grabbing Roshi, I considered getting Han...but...

What'd I use him for? He does have super armor and self healing, compared to immunity and self healing. He can dodge, compared to burning and powering up when hit. And he has a single target chase, good for combos, but Roshi's chase, which is harder to pull off, does more damage.

Plus, other ninjas can remove buffs, shields, etc.

And as for Standard, Han has a sweep, Roshi single target, that's preference. And as for mysteries, they're both mainly there to even the field, anti buff teams.

Oh, if you're wondering about looks, I'd go for Han, he's cooler.