tbh you just need one team that can clear everything
So far my dark and light team cleared all GO. But I prefer ele adv with R missions because I don't have Shingen yet.
Either you lack survivability and heal or you don't hit enough. If you hit enough you don't need heal I prefer dmg cut over heal tbh, expect of Drag currently.
Again I don't have PF and I am sure some player who started later like with Icarus, Tiamat or Barong Event have to do it without anyway!
My point is you don't need PF to kill that b!tch in 4T even with off-element, but that's only if you have the "hard hitting" KHs like Svarog AW, Uriel (AW this month), Pluto, Chernobog, Water with Asherah and so on.