that's basically the same 2.x opener, except with combining oGCDs to make room for DWAD and duality. i think it's fine yeah, dont think theres any other realistic way to fit those two skills in otherwise. you'll likely have to use fuma probably since you'll clip slightly with jug+mug

you should definitely do trick>kassatsu though, because if you weaponskill right after trick attack, it doesn't actually take effect (unless this was fixed).