Here's the setup: max conc, bo, mastery with +5 all skills, perfect botd zerker, inventory full of +3 max charms, 240 str, lvl 90.
60%ed extra from steelrends gives: 1735-6312 dmg 4023 avg
without steelrends dmg is: 1624-5908 3766 avg
difference of 404 max 257 avg
pvp penalty makes it: 67 max 42 avg
50% dr makes it: 34 max 24 avg
formula for open wounds: Clvl=61-99: (45*Clvl-1319)/256
ow dmg is: 533 over 8 seconds after 1/4 pvp
66 dmg/sec
unresistable attack
So would you rather have an extra 34 dmg/hit (over who knows how long between hits) or an extra 25% chance at an amazing dmg mod?