Try the RMT section of Smogon. http://www.smogon.com/forums/forums/xy-ou-teams.261/Opinions on what the 6th pokemon for my team could be.
Team so far:
Mega scizor- bulky SD +roost
Latios- defog, hp fire
Conkeldurr- assault vest
Landorus- physically defensive SR setter
Rotom-w - specially defensive
You will get far more detailed help. (In theory).