What is your setup after bt.214H?
I've also been messing around with using 5k > 2H as my hit confirm. Combo into rekkas on hit (or even on block because they're pretty safe?), and I can also late cancel the 2H into projectile too. I dunno, maybe not good, but 2H seems to have more range that close 5S so it drops less?
I'm still noobing it up over here but I'm finding Leo super fun. Not nearly as intimidating as the other characters either for us players that are used to only hitting 4 buttons in a combo.