I was planning on running a Burst build for my Water team with Shingen (Cthulhu, but no Asherah). A free EX slot for Sniper Shot is mandatory for my team, so Hercules wouldn't help much if at all. Shingen's Burst generation is somewhat wasted, but maybe she can get in 2 Bursts and speed up a Full burst by 1 turn?
Endurance builds don't seem very effective (or time-efficient) for endgame content; Light was given massive offensive buffs for a reason. Many of the emerging damage checks seem to be tuned to be lethal if failed, which is probably motivated by revenue strategies. If your goal is selling success, then it makes sense to limit players' ability to innovatively overcome challenges with resources on hand without paying the toll.