I have seen this tech on many sites but this is the proper way of doing it take both your hands and touch the fingertips together while doing this ground for energy and send it in between your hands do this until you can feel the ki ball becoming hard and solid than throw your hands forward and let it go.

 

This is mana and ki fused together into a huge devastator blast

 

Hold out both hands like this - palm flat and gather energy into one hand ki into another keep gathering until you feel the energies throbbing than slam them together and yell haaaaaaaaaaaaaa while sucking more energy into the fused ball than throw your hands forward and blast your target