billd91 said:
Why should it scale at all? Is the salt getting more irritating because the PC throwing it is a higher level? Besides, as the PC fights tougher opponents, the tactic becomes naturally less useful, another reason it surely won't be used constantly.
Because you throw it more accurately, and more salt goes straight into the dude's eye.
Compare to the 4e universal mechanic. If it's a Dex attack vs reflex (or fort), there's no AoO, and the saving throw to shrug off the effect is the standard 10+, the tactic always keeps the same effectiveness (possibly more than 1d4 rounds if the DM rolls the saves poorly). Why would everyone not use it constantly in 4e?
Well, that would depend on how it were implemented.
My view would be to make it so that throwing salt is combat ineffective for the typical person (your opponent just ducks the slow moving spray of salt), but you can take it as a power. If you take it as a power, it becomes part of a combination of techniques that make up a per encounter or per day power. So you don't just throw the salt, hopefully gain a combat bonus, and then exploit it on later turns if its still around. You throw the salt as you lunge to stab your enemy, gaining immediate advantage, even if the salt wears off quickly. This is a long way of saying that the reason that people wouldn't spam this in 4e is because, in my design, it would be a per encounter or per day ability.
And since I'd be custom designing it for a player, I'd ask him how awesome he wants his salt throwing to be. Does he want to throw salt relatively often, for a small benefit? If so, I'll probably make it per encounter. Or does he want to throw salt as a surprise attack that permits him to absolutely rock his target? If so, I'll probably make it a per day ability, and strengthen it accordingly. I can write it differently if he wants to throw salt, gain a minor advantage and then lunge, versus if he wants to throw salt and gain a massive, longer term advantage. I can even make multiple salt throwing powers, each which combine with different types of attacks. Maybe rogues throw salt differently than monks, and monks throw salt differently than barbarians. I've got a lot more space to play here.
If "you can't throw salt every round because its a per encounter ability and that's that" causes your brain to spasm, then 4e (and frankly D&D) may not be for you. If you're ok rationalizing to yourself ("ok, it only works as a surprise, and once your enemies see it, they're ready for you to try it again"), then you can move on and just have fun throwing salt in people's eyes then punching their lungs out.
And for the record, the odds of a 4e "save ends" ability lasting more than 1d4 rounds is low. The expected duration of 1d4 rounds is 2.5. The expected duration of "save ends" with a 50/50 save is less than 2.