As a same supporter role as XiaomuK, I like this build a lot and feels it has more successful possibility.
It frequently buff allies and weaken enemies, which looks pretty much standard of condition applying build. It also does some burst damage as well.
One thing I want to note is that It could lack in sustain a bit because of no 300hp Ryoki barrier or additional stealth pet, and shower gun's slow reloading speed which will eventually make you exposed to enemy to be damaged when reloading. Also stealth cannot be combined with Ryobi's damage boost.
Overall, idea itself is really kinda unique and very good.
I very much wonder its performance if and only if it uses DLC cards.