Utility of fives vs boba fett? (Esp for defenses)

That's a tough one.

I don't have Fives so I can't really say how good he is from experience but from what I've seen levelled up, his Tactical Awareness gives him 70% counter chance and +25% counter damage. Coupled with his Combined Fire which essentially gives you a double attack when he calls an assist means he can dish out a lot of damage regularly. He also has utility with his speed down debuff.

Fett on the otherhand has an 80% chance to apply Ability Block on the whole team since it's an AoE which some may argue is more useful than bonus damage since a blanket ability block can completely mess up a team at the right time. Not to mention he has a 30% chance to revive which I've noticed happens a lot when I'm fighting against him.

Going from my own experience in fighting against these two characters in PvP I'd say I probably rate Fett a higher threat than Fives, but that's just me.

You'd need to get feedback from the others who I'm sure have more experience than me with the these two.