Ah, but that's the point. Since that's exactly min/maxing.
As for SSRs, hmm. Hard to say. There's a couple of decent SRs for Thunder, but generally no element will do "well" without at least one SR. Dark will probably be best off if we get Koihime, since Nyarl-LuBu will have -30% Atk Def covered. And then there's Beelz, the queen of SRs.