any particular archetypes in mind? most that i can think of are viable in end game, even if they arent op

my favorite so far (in a solo-only challenge i'm doing) is the following for hanafuda (in later stages, you can ditch hanafuda to only use her passives aswell):
Hanafuda:
1 Loosen Up (light regain in general, can be Gigigig or the other puppet light regain)
1 Stay Calm
3 relay (Evades)
2 shuffle hands (use the evade discarder if you have that instead of ShHands,)
1 Rehearsal (or whatever other card you wish to use, this one can be replaced)
1 Sakura (you'll see why in the passives)

Passives:
Your shield
Best choice
KiS (keeping in stride)
(if possible, Flesh shield thing, the Def +1 or evade+1)

other modifications are using Mi's passive (i think) for the extra defensive die on an enemy one-sided attacks, then making Loosen up a Smoke-gaining Light-regain. or "Loosen Up" and "Rehearsal" for "Graze the Grass" and "Ripple" (or the other charge-consuming combat pages), or just more discardables outright (maybe Rehearsal for the 1-3 light costing Thumb pages if you do it on a Thumb-member)

For olga/(or just her passive that you will slap onto Lowel bc whynot), try and find a strategy making you have about 2-3 or even 4 cards in your deck, to get benefits out of Rain's passive. (aka lots of Clone, Mods(from Yae), Persistance page) You might be using quite a few counterdice for this one, maybe Xiaos 2-cost clasher w counter slash-die on Kim.
Or just try different Brawl-decks! (there is also one deck on yt (charge guide vid i think) that combines Smoke and Charge together (albeit a defensive deck))

There is still a lot to try out! (like how i asked on how i could use Sword of Volition in a deck, made a few of my own, then got a strong light-support recommendation)
if you like, you can try ammunition-passive on anyone you feel like, with Singular strike, then go ham with dumb strategies!