I've never had two dupe leggos before (I'm FTP) so I'm excited to ask this... but what's the best thing for me to do with two Donnys?

I feel like I could use them for some kind of unkillable CB team? They may not be able to reduce the cooldowns on each other's cooldown skill, but imagine a team where every 2 turns virtually every champs' skills reduce their cooldowns by 2, if you offset them properly?

Or a FK or Spider team perhaps, resetting coldhearts?

Or Arena? I have Mikey, obvs, so 3 turtles with their synergy have GOT to have a cool use... What would you do?