I'd like to know how you can equip 20 piece of gear. This must be a troll secret. I don't know wtf you are talking about with -15% magic damage thing. Resistance build is nearly -100% damage taken not -15%. Look
full damage p=0.95
1/2 damage 0.0475* 1/2
1/4 damage 0.002375 *1/4
1/8 damage 0.000125 *1/4
=> on average you take 19.22% of the full damage. With shell V that is 14.56%. In other word a elemental reisist build would be equivalent to -61% magic damage taken. Contrary to what you claimed, it is done 6 pieces of gear only because there is this wonderfull spell called bar-
As a jackpot bonus your are immune to enfeebling spells to that element.
It's funny, it's almost as if BG is learning elemental sets in 2011.
If your melee pulls hate and aren't trying to tank maybe you should reconsider why you are bring them. I think you are too much in the 2004~ hnm mentality of fighting weak mobs like Fafnir. If you are doing it right you bring 2 healer 2 tanks (=DD) 1 BRD and 1 THF. At no point anyone but a tank can possibly pull hate. "Pulling hate" is an expression that refers to an FFXI era where people tanked with PLD in dynamis, and fought hnms with PLD, an era that you clearly seem to belong. You should use a time machine. There is no situational where, under the new FFXI (since 2006), a tank would require a D ring, nor a mage.