Ok Slant, here I come.
Skarmbliss. Skarmbliss. You love that chansey huh ? But you know I really hate it. It's setup fodder without T-wave, and it's just an ugly-over-predictable pink blob.
Because you're weak to electricity, and because your team don't like gastrodon (EQ variant won't let Jirachi setup) you should add Ferrothorn. Ok he's ugly. Ok he's predictable. But hey. He check electricity, he check kingdra who really do a number to your team, and he still provide spikes/sr.
With ferro, you're now weak to fight. Meh. This is the bad part about ferro. But he's got a red eon friend, who just fit really well with him. The name is Latias. He's so damn bulky, he will do chansey job like 10000x time better, resist both Fighting and Electric move, who are your biggest weakness atm. He also provide a let game sweep, which is always welcome.
If you take latias, you're now a bit Ttar weak. And you really don't wanna have two psychic type on a same team. Solution is simple, Tentacruel>Starmie because if Tyranitar mannage to kill starmie, and put SR, you're now in a really bad situation. Tentacruel rapid spin like a pro under rain, and don't give a royal fuck about Ttar. Plus, toxic spikes is always welcome on that kind of team.
This is just a nitpick, but I think Scarf toed provide so much extra kill, that it his by far better than specs. (You outspeed all geniuses with a timid nature).
Skarmory -> Ferrothorn 252hp/168def/88Sdef 0 speed EV Relaxed Nature Stealth rock/Spikes/Power whip/Gyro ball
Chansey -> Latias 200hp/52def/252Sdef Calm Nature Calm mind/Surf/Recover/Dragon pulse
Starmie -> Tentacruel 252hp/252def/4Sdef Bold Nature Toxic spikes/Rapid spin/Scald/Protect