Nobody cares about star gen in arts teams so that’s half of the skill being useless already and his base NP gen is garbo anyway so the NP gen buff also doesn’t really help him
the biggest downside is having to use Fionn in the first place though so ;/
He’s not an attacker because his damage is terrible
He’s not a support either because he offers nothing to the team outside of a NP gen buff
The only thing he’s good at is eating a big hit and dying but even that has a chance of not working
Wait for Saber Fionn if you want a good Fionn tbh