Leveling Fion

Just burn him, there's better Arts lancer servants out there

Fionn gets better in the future. He's currently mid-tier in JP. He's not too helpful at the moment though.

His first skill post-stenghtening makes him a very decent arts-crit support. Put him with Nursery and she will be generating a ton of stars.

Castergil is still better on this...

You can alllways use the taunt as a kill-switch, to save more useful units...

It's not that bad, but if you don't like the burn him.