I meant “alliance” strategy. A basic one is using the same tank color - it forces the opponent to use a lot of the same color or go weak against your tank. There are a few others too. How big is your alliance? How strong are your mates? Some work better with more established alliances while other thoughts can help out all alliances.
May i suggest doing a search, like for war strategy? One link is below but there are more. Also, feel free to ask specifics.