Nice write-up Pigi, informative read and a good insight on Kirai.
I often find myself summoning Onryo over Gaki via evolve spirit because I think I may as well go all the way when saccing a seishin and getting an 11 to cast.
I have yet to get the Gaki into melee and trigger Feeding Frenzy though, its such a brutal thing....
Datsue-Ba is such a good deal for 7ss its unbelievable, totally worth it even just for an 8wd Spirit nevermind one that is a beast in combat, can effectively summon, mess with movement, push to a model AND heal