Well, may as well throw in some two-cents here.

RUN is terrible, it's an absolute joke, but to be fair pup/dnc/blu all started out as complete garbage also.

It's kind of like giving a 2005 ninja ragnarok, yeah all the "special" people would do it, but we all know that putting a Heavy weapon on a Light job is just /fail. Facepalm city.

Now, RUN has some good aspects, it's on a nice track to be useful in 2016, we're beta testing it, a concept that has become ever more apparent as of late. But for right now, its pathetic, and if you bring it/use it at anything that it should've been useful for it pales in comparison.

Let's take a single casting element mob, maybe Glavoid, everyone is afraid of Glavoid and it's instant death Disgorges, RUN could potentially be the best job possible for killing Glavoid. It only uses earth, you have EPIC LEVEL earth resistance and magic mitigation.

Now, by contrast, let's take Botolus Rex. You have -ZERO- chance of stopping magic damage from an enemy that isn't limited to one element. (as someone did mention) (and yes, you have fool's drinks, let's pretend these don't exist just for a moment, please, ok?) Rex is going to DEVASTATE you, as will "most" enemies in the game. Only a select few are limited to using one element. Making RUN "essentially" immune to ONE element and leaving it exposed to the other SEVEN, is a rather sizable logic flaw.

Now, let's say for example that RUN only had 2 Runes, light and dark, in which each covered the FOUR elements associated with it, you could legitimately have a viable reason to use RUN.

It's still not the best answer, but 4/8 is much more reasonable than 1/8... when Aegis covers 9/8 (non-elemental magic damage ((meteor))).