Ok so, I am just going to go about each pokemon one by one and say what I have to say about each.
Lets first start off with a winning strategy, right now i would go with a team that can counter the most used pokemon
i.e.
M.Kangeskhan
Garchomp
Talonflame
Rotom-W
Charizard-Y
M.Mawile
Salamence...