my friend got Jinhsi S2 plus signature weapon and lupa as well, those are her best characters, shes trying to do whiwa, but failed, I tried myself with the same account but I can't find the proper party or setup to get S, is it impossible with those characters?

the teams are Lupa s2r0, Changli & Brant (no sequences no sig weapons)

Jihnsi s2r0, Zhezhi & Shokie (no sequence, no sig weapons)

do I have to git gud or theres really no hope