You're math is a bit wonky, so I'll use some generic numbers. The 5 normal tier 14 pieces have 8405 secondary stat points on them if you include a crit meta and 320 in all the gem sockets, but not counting socket bonuses. The 5 heroic pieces have 9321, a 10.9% increase on 13 ilvls, or about .84% more stats per ilvl. I'm going to use Gynshon's numbers since you don't supply your armory. With hit and exp at 7.5 Gynshon has just under 17k points split between haste, crit, and mastery in ilvl 511. At 522 he would likely have 9.24% more stats, or just under 19000 points to play with after taking 7.5/7.5 again. Let's also assume for the sake of this math that absolute minimum you can put into a stat is 2k. If he were to go 9k crit, 8k haste, 2k mastery he would get 20k crit for 10 seconds, 33.3% crit for 10 seconds would get you about 8 extra EB charges per proc.