"UA > Ruin more dps."
ruin is much more dps if u have nice +dmg (>1000) and nice crit gear. with 20% crit chance ruin worth much better then UA.
imo.
You're wrong. Take a look at the math.
Ruin adds about a .5% DPS increase for each 1% crit you have. Say you spam 100 Shadowbolts that each do 1 damage. You have a 1% crit chance.
Without Ruin: 99(1)+1(1.5)=100.5 damage
With Ruin: 99(1)+1(2)=101 damage
That is an .4975% DPS increase, basically almost half of 1%.
Assume you have +1000 spell damage. With buffs in a raid, this is easily possible. Also assume no debuffs such as Curse of Shadows, Shadow Vulnerbility, Misery, etc. are up.
With 1000 spell damage, UA hits for (1050+1.2x1000) 2250 damage x 10% from SM = 2475. 2250/18 = 138 DPS.
With 1000 spell damage, Shadow Bolt hits for an average of (572+.857x1000) 1429 x %10 from SM = 1729. 1729/2.5 = 691 DPS.
To make up for the 138 DPS that UA brings, you would need your Shadowbolt spam to do 829 DPS, a 20% (19.97%) increase in damage. The only way Ruin can outdamage UA in this situation is with 40% or more +crit chance.
The actual figure is probably a little lower when you factor in the cast time of UA and the slight DPS increase that Ruin brings to Improved Shadow Bolt. I'd say the figure is between 35%-39%. However it's almost impossible to factor in those figures, especially because Improved Shadow Bolt is dependent on other raiding warlocks' talents and crit chance. You'd still need at least 35% crit chance though to make Ruin > UA.
i made my maths after ur one, and i have to agree. (ty for openning my eye;)
but some corrections: ua 2sec cast (as u said)-> 123 dps
approximately 30% crit chance it can converge to UA's dps;
(shadow bolt 1700, 1000spelldmg, 250sec period, 100hit)
20%crit
136000+51000=187000 dps=748
136000+68000=204000 dps=816
30%crit
119000+76500=195500 dps=782
119000+102000=221000 dps=884
the shadow bolt spam between the ruin and non ruin spacc generates > 100dps difference, and i didnt care with imp. shadow bolt, which makes it better.
btw as we know these are only math, in real world (lol in wow) not everything is ideal, u can get +crit buffs, bloodlust, trinkets can proc, dots doesnt worth becouse mobs live for only 10-15sec. and thats why i specced for 40/0/21. in most cases ur dots dont have enough time, and simple 3 shadowbolt+shadowburn are cool. but in 25men raid instances, where substantial dps matters, 41/0/20 > ruin until we dont have 33%crit chance gear
UA > ruin while your crit is under 33% (at 1000 shadowdamage)
you had 40/0/21 Late?? time to respec