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

I've had a lot more difficulty taking down fives when he's on defense (this is at level 60 and I'm assuming they're 6+ stars). You can try and take him down, but he'll counter with slows and slow your whole team. You can ignore, but then he'll dps and slow you down quietly. There's a team in the top 50 on my soft-launch server with a 4* Obi Wan as leader (evasion and turn meter on dodge) plus a fives. Only managed to beat him with 3seconds to spare.

Offense though Boba definitely makes things easier for me.