I've playing this like a maniac over the weekend. Gotta say, it's probably my favourite Musou game to date. Finally unlocked all the characters and I'm in the middle of trying out the newcomers.
I never bothered with weapon fusing in WO2 and after experimenting with it here I remember why. Just tried a 10 star Chaos stage for a laugh (first time on Chaos) and unintentionally ended up solo'ing it using a level 31 Kaguya with a 9+0 big star weapon. Weapon set up was Confluence, Wind, Slay, Osmosis, Absorbtion, Agility, Blast, Flak (no Brilliance because I thought it'd be OP). Encounter mob --> R1 --> things die + refill Musou/HP --> R1 --> Triple Attack --> repeat.
Also is Wang Yi's musou screwed up? I keep having officers mid-air flipping out of the last hit.