Originally Posted by
gherkin
How to calculate the average amount of a trinket proc:
Trinket Proc x Duration / Cooldown
Don't forget to factor in the time to proc - I usually add 5-10 seconds to the cooldown, depending on how low the proc rate is and how many different things can proc it.
Abyssal Rune = 590 x 10s / (45s + 5s (easy to proc)) = 118 spell power, on average.
NMIC = an average 12% crit across 5 DD spells. (20+16+12+8+4)/5 = 12
12% crit = ~530 Crit Rating.
Therefore, this proc is: 530 x 10 (avg time to cast 5 shadow bolts) / 180 (3 minute cooldown) = ~30 Crit Rating.
So:
118 SP + 84 Haste
vs
111 SP + 30 Crit
##################################################
The trinket was specifically designed to roll Corruption and SW:P. That's all its good for.