So, how about that Unaware+Clefable.
Clefable @ Leftovers
252 HP/252 Def/4 SpDef
Bold / Unaware
Cosmic Power
Toxic
Softboiled
Assist Power / Fire Blast / Encore
Stat boosting? Switch in and boost up with them, gradually recovering off their damage and stalling them out. A lot of idiots will try to boost on the switch too if this is out already, so you can get a jump on them by defensively boosting and then stalling them out, since they basically just wasted a turn doing nothing. This can actually set up on Roobushin if it bulks up expecting you to switch, especially since you outspeed it so that you're at +2 before it hits you with drain punch. Pair this up with something to get rid of magic guard things and it gets fun. Steels kinda suck too, so a physical fire attacker would probably help deal with both.