@ ND: i have never run the cows with a blizz sorc so all i can do is assume, so take this with a grain of salt. cows have 50% resis, so infinity will have no direct affect on your damage output to them, should your cold mastery be exactly -150% or exceed that. if it doesn´t infinity will increase your LCS-skill damage by the difference of (150 - CM)%. however due to the merc the cows should clump up in small packs (if your blizz kills them fast enough) so those small clumps could be the reason you kill them faster with one. the damage of a blizz sorc will not scale with the amount of enemies, like it would for a light sorc, javazon or trapsin. i guess i would use a merc for cowing, but i have never tried
@ twibz: cows die very quickly without good equipment. so you really don´t need to worry about it. after pierce, cbf and ias, -% should be the best way to increase your damage. cows have 50% (according to AS). if +skills or +% increase your damage more is dependent of the amount of points in synergy and +skills you already use. ormus works just like facets or griffon does, so it will increase the damage
@ twibz: cows die very quickly without good equipment. so you really don´t need to worry about it. after pierce, cbf and ias, -% should be the best way to increase your damage. cows have 50% (according to AS). if +skills or +% increase your damage more is dependent of the amount of points in synergy and +skills you already use. ormus works just like facets or griffon does, so it will increase the damage