does this include the elemental damages on weapons? (+xxx-xxx poison dmg etc)
The Min/Max damage listed on a weapon includes any +min/max damage, +elemental damage, and +% damage on the weapon itself.
Does attackspeed help rend at all.
Does bash with the stacking damage to skills help rend at all
Does wotb help rend at all? If not what skills boost rend.
What 2h should be used for the passive, I use a sword for the 15% damage increase.
Attack speed is not figured into the damage calculation at all. Something to note, however, is that slow weapons have higher min/max damage to keep them in the same dps range as faster weapons.
All skill based damage increase affects Rend including Bash, Frenzy, and WoTB.
The odd and somewhat surprising thing is that the Weapons Master 15% passive does not affect Rend at all.
I would use a 2h Mace/Axe to get the extra crit chance. Rend will crit and put out some really nice damage. Crits are determined when the ability is used, not on individual ticks. Crits are also determined individually for all mobs hit, so it is possible to hit 4 enemies with Rend and have it crit on 2 and the other 2 take normal damage.
As a side note, Rend ticks every half second over 5 seconds, so if you want to know how much total damage your Rend is doing, just check the tick and multiply by 10.
Please look at my gear and spec and if you have suggestions let me know in order to increase rend damage. Currently white mobs take 1-3 rends ( allowing for each rend to apply and wear off) so 15s. Bash is criting for 150k-350k .
Any help would be appreciated in order to make rend amazing. If its stack str and damge items and drop crit Ias and crit damge I'll do it.
You can definitely use Rend to obliterate mobs en masse, and your skill set looks good to accomplish that task. If you really want to pump out as much Rend damage as possible I would suggest getting a 2h Axe/Mace with high str and high crit damage. I would also try to find one with life steal so that you could practically never die with the amount of life being returned in conjuntion with Blood Lust. Then get +dmg, str, crit chance rings and amulet. Every 2 added damage = 147 extra Rend damage, so if you find a ring with +30-50 damage, that is an extra ~6000 damage. Then switch out your gloves and helmet for even more crit chance.
If you can get a 1200 damage average (which shouldnt be too hard) and 2000 strength, then your normal Rend will be 176400 or 17640 per tick. Then if you can get 50% crit chance and 300% crit damage, half the time that will be 705600 or 70560 per tick, and that isnt including extra damage from Bash or Battle Rage or WoTB.
If you get life steal on your weapon and belt for even 7% total, combine that with 9% from Blood Lust, and using the damage figures from before, a non-crit Rend will be returning 564 life per enemy per tick...