This is not a "best team" thing, but my current team for online battling is Hawlucha, Mega Scizor, Garchomp, Mimikyu, Swampert and Zapdos.
Here's the thing, I use both Swamp and Chomp on doubles, and Swamp as my singles lead, and I don't want repetitive types so I need to ask: Should I take off Garchomp and replace it, or take off Swampert and replace it?