Yeah it might turn out really good,its just specualtion.But being shadowless for the rest of the round is a huge drawback,not only do you lose pretty much all of his launchers but you also have gimped strings and he uses the shadow in the vast majority of them.
It just doesnt seem all that good considering the drawback,i mean im very eager to lab what an optimal full structured combo would be using that buff and kameos and see how much damage you can do.
A big thing thats imo going to make or break this buff is can you choose to spend this or is it automatic on hit/block.If its automatic and you spend it on first use of a special move,then imo im going to comfrtably call it very niche and situational hot garbage