lord_aurelian
I'd think starting with the wind law would be best as it has some of the most utility other then water (as usually water can also heal) wind has good offense and defense cause you can not only make sharp blades of air but most things need air to survive so with a high level in wind you can just rip the oxygen out of people's lungs perhaps even put an air bubble in there bloodstream for assassination without people knowing who it is could also make a lesser version of Gojos limitless by wrapping himself with air