You should go Earth first, since weapon master is not very good to farm with. A decent build is 70 STR 60 INT (Earth Wall, which was the main reason this kit was a sleeper, but got nerfed, is still worth getting in my opinion) and adjust your HP and Chakra according to how you want to play (Tank, DMG, etc.) A good area for both HP and Chak are ~1k HP+ and 275+ Chak. This is just a basis, you don't necessarily have to even go 60 INT if you don't want to, but the 70 STR is overall the best spot for WM Hybrid in general.