fyi, xxx combat rating (electrical) still contributes to your dps.. what it means is that those percent of dmg dealt by that combatrating is mitigated by your opponents electrical protection.. it got nothing to do with either you do electrical attacks or not..
for instance; lets say 100 combat rating = 100 dmg on a hit before mitigation.. with 200 combatrating its 200 on a hit, etc..
if you atm have 100 combat rating, and hit a target with 50% mitigaton, you will deal 50 damage.. if you then get a ring with 100 combat rating (electrical), you will have a sum of 200 combatrating, but when you hit your target you wont deal 100 damage.. since most targets have lower protection then mitigation you will likely deal more damage.. the damage you now deal would be 100 - 50% mitigation = 50! + 100 - x% protecion (probably lower then armor, eg 25%) = 75.. which sums up with 125 total damage, where only pure combatrating would deal 100 total damage..
combatrating ("magic") is a good thing, and doesnt mean you need magicdmg/spells to take advantage of it
edit: think i misunderstood OP so my post is kinda reply on touchii's post