build based on SSR is pretty good start i think, it depends on what you have thou. sol and ama practically can fit on any element team.

for atk/def down debuff, you need to learn the basic such as a/b/c frame debuff, its a term whether certain debuff can stack with each other or not. u need to do lil bit research to know which skill is what frame.
blind/dizzy is always good to have.

debuff is super good and all, but dont forget you need luck to land it(well u can always use mordred skill to increase the odd)
IMO, in the end what matters is your kamihime's stats, stack as much as u can and u will do at least decent.