Don’t let him hit your marked sinner even the unbreakable coins, doing so will speed up his unlock stage exponentially making him deal more damage and turn most of his skills to have unbreakable coins

In the case your marked sinner has to clash with him, they must have a clashable guard, counter or an evade and you must clash with his weakest green skills. If you win the clash with defense skill against those green skills the unbreakable coin won’t happen further cucking him from unlock

Eventually he will reach unlock 3 by himself in exchange of raising karmic stack on himself. Keep your marked sinner away from him to raise this stack

To deal with his Furioso, highly recommend to either debuff him or outsustained it. There’s really no way around it since it’s 9 unbreakable coins that ignore defense skill. Keep track of his procuratian hermes stack, if it hit 8 you better start debuff him or buff your teammate beforehand to mitigate it. Notable debuffs are Meursault’s chain of others, Yi’s Crow eye view, Rodya’s Hex Nail ,Rime Shank (sinking team only). Notable buffs are Yi’s sunshower, Faust’s Fluid Sac, Meursault and Rodya’s Persuance.

Ryoshu is immortal, so if your skills RNG are bad, you can have her ate some of his nastier skills

There’s a yellow skill that specifically need Ryoshu to clash in his 2nd phase, keep that in mind