Game Mechanics: 255 resist cap for all P99 eras (Pure classic - end of Velious)

[Nirgon]

Now that rampage is on track to work/pras Haynar...

The next step for Velious raiding to be a classic/challenging experience is to set the max resist available to players at 255.

Going in with 400-500 of a given resist (immunity) is going to pretty much ruin the experience for encounters with aoe spell damage.

Feasible? Can't modify this because it is client side? Secrets "hackery" needed?