If you ate f2p, * with lightning. It allows for the cheapest semi decent lineup with Kimi (3 star him asap) and sasuke. 4th ninja will be Guy until you can farm Iruka.

Problem with water is you tend to require better quality ninjas for synergy, else your main is pretty much just a standard healer. based on your roster, you will either have to build a lineup around Kimi, or Kiba GNW, the rest of the other ninjas just cannot cut it as an anchor.