Is this a good team for pvp?
Not bad. I would open more packs to try do get buuhan (Ultimate Gohan Absorbed Buu) so kid buu gets that strike attack boost. Piccolo is a decent unit, but his z-ability that boosts blast attack is kinda useless for kid buu. So try to get either buuhan or lord slug or any unit that boosts regen strike attack
If You have EX Purple Nail You can go full regeneration instead of having Android 17 and the android bench.