[Autumn]

From what I can see the main problem when it comes to resists sapping momentum is when 1m mobility or fleur is brought into the equation (or rarely 4m skills or other combo mechanics such as with DH and Verglas), I think the former (that being 1m mobility) could get even more out of hand if the system was changed even a little bit, so I have a smarter, safer suggestion than that, that might help specifically fleur builds anyway.

For whatever reason, resists can trigger and sap momentum from the attacker during a critical hit but the opposite cannot occur, that being weaknesses not granting additional momentum, now I'm not in any ballpark of giving potentially +3m on a crit, but I think this is very inconsistent and hitting critical hits should not incur a resist penalty either, to match it's inability to gain weakness momentum.

That only seems fair doesn't it?

Personally I wouldn't mind not getting momentum on hitting weaknesses, but I feel like that would hit mages way, way harder than the people benefiting of resist minus momentum getting removed.

Oh no, what I'm saying is that hitting a critical hit on someone while also hitting a resist shouldn't be a momentum neutral exchange is all, given that hitting a weakness + critical proc at the same time doesn't incur both benefits, it shouldn't incur a negative either (Specifically only the interaction with critical hits), it would have no effect on how mages currently interact with resistances. Currently hitting a 25% resist incurs a negative momentum penalty on mages but it doesn't overall affect their gameplan unless 1m mobility or enhancements were involved, as most spells don't cost 4m.

I have no desire to affect how weakness momentum works in it's current state, I think weakness fishing is a viable strategy with some elements (water/lightning/ice) and the possibility should be open to others too.

The most polarizing cases of getting your momentum eaten mostly belong to basic attackers as their gains and skill costs don't allow flexibility in that regard., with pierce resistance being such a viable option you might change your build to account for it in cases you don't have crit evade.