I'm not using t19 after the nerf, and i havnt gotten t20 4 set yet, so i'm using 4x 925 pieces + Arc/CoS 2 set, with 14k haste and 14k crit thoose 55 stacks are fine to reach, with t20 4 set it will be done blindfolded
i have t20 (normal mode) and normally i can get 50-55 stacks (depends on witch stacks i use MB). I dont know on which stacks i must use MB, but normally i use when i have 25/30 stacks
I got a 61 stack on mistress this week but that was an absolutely perfect storm of a ton of AS procs with lust and everything else and that was with 2pc T19/2pc T20