So I'm building a competitive team, (single battle format) and I have both an Ampharos and a Blastoise.
Blastoise
has rain dish ability, holding leftovers
moveset
protect
waterfall
rain dance
skull bash (I'm thinkin' of switching this move, so any suggestions would be nice)
blastoise's attack is higher than his sp attack stat
Ampharos
static ability ,holding ??? (I not sure what to give him)
moveset
Thunderbolt
focus blast
dragon pulse (or other dragon move)
cotton guard (to cover his defense)
If you could suggest which one to use, I would be very appreciative