Mono-Red decks can easily cast it for its regular cost as well, as they'll always have access to Red mana
Can you put equipment on your opponents creatures
His Jeskai (red, blue, white) colour identity gives a lot of flexibility between power and control, but his key abilities lies in the ability to Bolster his comrades, and also being virtually unkillable unless you have an Exile spell
I do think a focus on death triggers makes sense, so maybe Teysa Karlov and some Humans that replace themselves like Doomed Traveler, Hunted Witness and Imperious Oligarch could help you make a decent General Kudro deck
That said, Merfolk Secretkeeper is technically slightly better since it counts as two blue spells for Drowned Secrets purposes
7 Death-Rattle Oni This Demons cost reduction ability is aggressive enough that it has potential in both Standard and Modern, but in Commander, it may as well just cost a single black mana at all times