I played with Swift Swim Carracosta, and I wasn't impressed at all. With the rain up, it starts with a pitiful 326 Speed and 346 Attack. Why am I not using Kabutops with 361 Attack and 518 Speed?! Carracosta NEEDS Shell Smash to be at the same level of destructiveness as +2 Kabutops. I guess a +2 Ice Beam to kill off Tangrowth is a perk it has over Kabutops, but that alone isn't worth it for me, imo. If I'm using a Shell Smasher, I am way better off with Omastar anyways ;0
So yea, playing with Carracosta was a rather disappointing experience for me; feel free to rebut, but atm I'm thinking of rejecting Carracosta.
Also how did any of your Rain teams fare against Hail teams? It hasn't been too bad for me, since Snover can only switch in so many times before dying (setting up Rocks help). Then I simply set up Rain and screw all over Hail sweepers! However, the opponents I faced weren't that great, so I'm not 100% certain that rain beats hail