It will be hard but doable. Getting has much immunity to fire is going to be key, I imagine, I may even build a gear set only for that.
And yea, I saw many nioh 2 videos where people favorite this power. I like the monkwheel myself, but this one looks better since is similar but drop and forget. Mastering monkwheel let me sometimes own foes in amazing ways, but also sometimes misfire, is hard to master. Kasha core seems simpler.
My character
https://twitter.com/Teiman/status/1369034540329668610/photo/1