I much prefer that pve warding stays the same. (Dark sea) As for armor? Yes, you shouldn’t be able to use virtuos on atlantean items, or actually use virtuos enchanted items with atlantean items. Im not sure how hard that might be to code but that would feel like a fair solution, obviously theurgist set also gives warding but i dont think it should be removed. Technically you can have 2 virtuos theurgist equaling to 4 warding which means all other 3 items can be atlantean. If the idea i mentioned is applied then the max would be 2 warding with both theurgist items which means 1 safe atlantean item which is tame, since 2-4 is on more of the broken side.
P.S. i only considered the theurgist cape and hat since i dont think anyone would use the robes or pants