Hey guys, I'm running through Y and Omega Ruby before SuMo come out, I already have my Y team picked out, but for Omega Ruby, I have one empty slot.

Wondering if you guys had any suggestions? What pokemon did you use in Ruby that you really enjoyed? Which ones were more useful than you had anticipated?

Current lineup:
Swampert
Mawile
Armaldo
Sharpedo
Tropius

For the last slot, I like Skarmory, Torkoal, Gardevoir, Altaria, but am open to suggestions.