I've not entered Savage a sine time, but A3S and A4S are even acknowlaged bu the developers as having their dammage requirement unreasonably high.

Skill isnt even what's lacking since Lucrezia, aka the first guild to clear second Coil and top 3 to clear final Coil, disbanded over the difficulty not being a skill gap, but actully needing higher numbers then even proper rotations and BiS gear could relyably produce.

A5s-8s could have simmilar difficulty levels to 3s and 4s and it be appropriate for Midas Savage while still being unreasonau for Gordias Savage.