for mode 1 I believe so far there's none to replace S.Kokkoro Creditta case you can change to P.Kokkoro. for S.Kokkoro could try replace with tank if still fail then Use magic team : Kyouka6★ or P.Yui, Ranfa, Neneka, Monika6★, Shizuru6★ mode 3 try replace Yuki with S.Kasumi.
It is jarring how there are chibi characters while having this realistically proportioned man. It makes me wish the other characters were like that instead of being chibi.
do you mean by Gacha rate? if yeah I think both of them same just the different is banner which is 3 years + in Jp right now the amount you need to sparks only 200 draws while global still 300 I do believe.