I need an opinion. I have the 720 cloth head piece from Archimonde from my heroic cache and 705 shoulders from Iron Reaper. The secondary's are exactly the same ones for my 685 tier helm and shoulders except of course more of it and the int is better aswell. Now I really just want T18 in both those slots but my luck just hasn't been going that way...I keep getting pieces I dont actually want for those slots..anyway....my question is...is it worth breaking my t17 4 set for those two item replacements? Currently I play Arcane and Frost and I'm just not sure it is worth it personally but I have no clue about the math behind it.