Armor Shred vs. Crit Multiplier on my 1 LP Nihilis?

I have quite a bit of 1 LP, well rolled, Nihilis. My current shatterstrike build just reached lvl 80 (CoF) and I just as I was exited to put on my Nihilis and slam t7 crit multiplier on it, I realized I had no armor shred. I realize I could get it on my gloves although I’m using a 3 LP falcon fists with t7 melee attack speed, t7 dex and t5 hybrid hp so I really dont want to roll a new pair of gloves since those are nearly BiS. My weapons (Scissor of Atropos) both have t7 cold melee dmg and t5/6 melee attack speed. I can farm more scissors, but armor shred and those stats are crazy hard to roll.

Which brings me to my amulet as the last resort for armor shred. I have 100% crit so crit multiplier sounds amazing, but I’m not really familiar which how much dmg I lose with no armor shred. My dmg is not an issue at 300 corruption, but pushing further and as I approach uber abby I wonder which of armor shred and crit multi is more beneficial.

take a look in here:

Take Shred - you will se how much you can gain from the number of shred stacks. This way you will decide what’s best for your build dps wise.
ps. As you can se around 80-100 stacks is optimal for any build, stacking more shreds have diminishing return, especially for non-phys dmg