I think we're on the same page, sorta. Thucy hitting and not stunning is still better than shayd hitting air.
thucy: hit stun hit hit hit stun hit stun hit
shayd: stun miss miss hit stun miss stun hit miss

Shayd gets 40% stun rate. Thucy gets 33%. I can't watch enough to get better results. It costs way too many coins/credits to watch a whole fight. Sometimes Shayd is phenomenal, sometimes she's embarrassing. Thucy is more consistent, at least in my experience. If I had to choose between one stunner and those were my choices, I'd probably pick Shayd. Given I'm choosing between a 3rd stunner, I'm still backing Thucy.