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Politoed will definitely be fun to use, I'm thinking of using this set:
Politoed@Swimming Goggles
Bold 252 Hp/252 defense/4 sp. def
Hypnosis
Hydro Pump
Focus Blast
Filler
It's kind of hard to compare to past sweepers because they didn't get an automatic speed boost, now blaziken is almost guaranteed to be faster barring a choice scarf, and I rather not waste a moveset for substitute over better coverage.
I would just go with 3 attacks and sword dance with a lum berry as Blaziken will generally force a lot of switch. I don't really like protect as it really seems like a waste.