[Autumn]

Personally, I'm all for it requiring stacking for a number that high, so you can't just apply the highest number immediately, or a lower amount of resist reduction, since just docking the scaling of the sword would end up relegating it to just being a sword used for synergy. But, imo, blood spike and scarlet twister were just things that brought a sword that for it's ability has been pretty underrated into the limelight more - it's not specifically just how it works with those spells that I'd imagine to be the issue.

Yes but historically the weapon's identity HAS been that it allowed weakness procs with a hit check, and has supplemented spellblade builds in the past because of it, it still requires a hit check to be made to fully utilize the weapon's effect (Which has been getting extremely harder and harder to do as of recent) and also doesn't have phenomenal power or scaling, infact comparatively to most other weapons its actually really lackluster already.

Carrying its effect to a stacking mechanic is un-necessary and completely chops the weapon's viability and what its already known for in my opinion, at minimum with 30% weakness proc for less duration (Probably 3 rounds) you can have only a mere 6% water resistance (Which is baseline APT SAN + 1 coral item) to resist the water weakness proc, giving it much more fault room.

But if you start having it be a stacking mechanic then it just starts falling apart very quickly, no one's gonna pick up a lackluster weapon and hit someone multiple times with it just to cast later, you will literally get more momentum efficiency just using whatever the hell water damage you were trying to use in the first place without the river sword.