any ground type with access to dark moves might have its way with you, also a weakened scizor might not necessarily OHKO a tyranitar ... and then you're screwed. Um also things like dugtrio could prove to be a nuisance with arena trap (Earquakes on Jolteon, heatran and scizor ... suckerpunch/nightslash for Latias (of whom it does outspeed) and then stone edge for everything else). If heatrans down Weavile could cause some problems too.
I think you might just want to replace one of your ground weak pokemon, I mean you have got levitate + flying pokemon, but 3/6 being weak to ground attacks is chancing it a bit. You might wanna try Leafeon in Scizors place?
Leafon @Life Orb
Jolly
EVs 252 atk/ 4 def / 252 spe
- Swords Dance
- Leaf Blade
- Return
- Quick Attack/ Synthesis
Hope I helped lol .