If you wanna know troop combos then:
1. commando/zooks
2. HT
that is all there is at this moment. pick one!
If you wanna know how you formulate a plan for WW, then the no1 thing to take into consideration, is each and every player's capabilities in conjunction with their coalitions.
You send to each enemy base, the one that has the most chances to 5 star it.