light +ice or light +fire should i delvl?

[lint]

so im 76 now
i have fire at lvl 76 ='/ and is wonderin will mana shield be worth the delvl
i know that you cant know for sure cause new skills havent come out yet but what do you predict? and for those of you that have played csro do you think its worth it?

also i know that fire masterie gives you the skill to counter against a rogues invisibility so is that better to have or mana shield

GRRRR!!!!!! gotta delvl 76 lvls of fire without silk ='( which means only 80% silk back and waste of ton of money that i dont have