whooooa we still need to work out the rain dance set there. like i said before, while swift swim does double floatzel's speed, you -need- to have at least a little investment in so you can not get outsped by stupid stuff like timid rotom-s and jolly sawk (because they do outspeed you w/ no speed). 132 Speed EVs with a neutral nature lets you outpace Rotom-S/F which is probably the bare minimum you should be shooting for. from there you can dump the rest in attack and then bulk. ice beam isn't worth it as you're literally just hitting tangela with it; ice punch with adamant is better. ice beam can be mentioned in AC though with a heftier investment in special attack and a rash nature.
name: Rain Dance
move 1: Waterfall
move 2: Crunch / Brick Break
move 3: Ice Punch
move 4: Rain Dance
item: Damp Rock
ability: Swift Swim
nature: Adamant
evs: 124 HP / 252 Atk / 132 Spe
edit: lol i c/p'd it and forgot to change nature
name: Rain Dance
move 1: Waterfall
move 2: Crunch / Brick Break
move 3: Ice Punch
move 4: Rain Dance
item: Damp Rock
ability: Swift Swim
nature: Adamant
evs: 124 HP / 252 Atk / 132 Spe
edit: lol i c/p'd it and forgot to change nature