Guess an idea when it comes to elementals is have it kind of like a junction to the weapon in which we can....sadly...farm or gather certain elemental spots to increase that power to a certain degree. Of course then I guess it would be mandatory for most groups then rather than a bonus to DPS. I can't really imagine how to really fix it, though I would like to see it implemented some how. I recall one FC member back on Goblin equipped all the Earth resistance he could (as a test) and said he saw almost no change in Titans attacks.