A (mostly) DoT build relies on landing the highest DoT from each single source/proc. %WD is considered a single source, iirc. And any further DoT application from that source is irrelevant until that highest number passes its duration. So there is a lot of time where you are only using the secondary non-DoT damage while that DoT goes to work. A pure DoT build would stack and try for crit, then just run away. Repeat on intervals.
That said, stuff always needs testing for play style and environment.
Let’s look at some numbers starting with the order of importance:
- RR
- regular damage (crit is unimportant if you don’t have much damage)
- OA and crit multiplier
DoT = damage * Damage multiplier * RR muliplier * crit
For example’s sake I’ll generally use that GoreDrinker I posted for values:
121-%RR (Dev Swarm -61%, Celestial Pres -28%, rend -32%,)
10% Reduced (ring)
-10 reduced (ring)
Bleed damage ~2500% (easy number to work with)
Example DoT proc: Bleed on Eye of Reckoning and ignore %WD for simplicity as an example Bleed DoT --> 880/4 = 220/s
OA ~3100,
Monster DA = DA-~250 (Crushing Verdict)
Crit = 80%
A couple of monsters for comparison (from GT monster Database)
Alkamos 113% bleed resist, 2200 DA, 30% bleed reduction, 35% absorption@25%health
Grava 13% bleed resist 2350 DA
Alkamos
113% Resist + RR–> ~-19 Bleed Resist = 1.19 damage multiplier @ .0.7 duration
3100OA vs 1950DA = 25% crit chance ([email protected] crit, 12.5%@1.2 crit)
220 bleed/s * 2500% * 1.19 * 2 (1.2 from OA + 0.8 normal crit) ~ 13K bleed/s
Grava
13%Resist + RR–> ~-129 Bleed Resist = 2.29 multiplier
3100 vs 2100 DA = 21% crit chance (13%@1.1, 9%@1.2)
220 bleed/s * 2500% * 2.29 * 2 ~ 25K bleed/s
Obviously these are best case scenarios, ie, critting for 1.2x, getting a crit, all RR applied, etc, etc
BUT, take all the bleed sources and do the same, you get a huge stack! This is where the crit impacts. Another 50% more damage on that DoT is that much less time for the monster to die. This is particularly notable on high resistance monsters, assuming you took all RR.
Ymmv depending on play and other damage sources that are non-DoT.
Btw: Great references for calcs are tqFan’s:
crit calculator
RR comparison calculator
Edit: Mondaqueras summed it up, but I was in the mood to run some numbers. 