Okay, so as you might see in Murmur’s comment on the Eclipse post (and his comments on the Druid forums) some of the math was flawed. I was also requested to expand the math from the previous calculations, I assume for clarity’s sake. Here goes.
For starters, just to clarify, when we deal with critical strikes from our spells, due to Vengeance, they do double damage. Thus, if you have a 30% critical strike chance with a certain spell, then out of 100 spells 70 will do full damage and 30 will do double damage. If it does an average of 1000 damage per second without critting, this is equal to:
(1000×70) + (2000×30) / 100 = 1300 DPS. Thus, this can be simplified to multiplying your DPS with a given spell by (1 + C) where C is your critical strike chance with that spell as a decimal (i.e. 35.67% crit chance is .3567 as C).
Let’s reiterate the numbers from the previous post regarding max rank Starfire and Wrath as given to us by MMO-Champion.
Wrath: Causes 489-551 Nature damage to the target. 380 mana. Avg. 520 dmg.
Starfire: Causes 661-779 Arcane damage to the target. 555 mana. Avg. 720 dmg.
I was also requested to use more realistic numbers (which hurt my Moonkin pride, I’m at 865 and proud of it) for spell damage. 1000 was cited as very low for raid situations and let’s do some random speculation for WotLK damage numbers at pop that up to 2000. I know some high-end Moonkins are well above 1500 raid buffed, right? Well, I think so. So let’s hope that 2000 isn’t too high considering level 80 raid buffed. Disclaimer: We actually have no idea. Level 80 isn’t even possible in Beta yet. But I bet it’s more than possible.
I’m going to again assume Moonfury, Moonglow and Earth and Moon, as well as Master Shapeshifter (and additional 4% spell damage) which is likely in a min/max PvE build. By request a talented Curse of the Elements is being added which boosts Arcane damage an additional 13%. This is all intended for raiding mostly, and Wrath will be more on par with Starfire for PvP or soloing.
Wrath: 67.1% coefficient. Thus (2000 x .671) = 1342 + 520 = 1862. Total 20% damage increase from debuffs. (1862 x .20) + 1862 = 2234.4 damage on average. Mana cost lowered 9% to 346 mana. Spell cast speed = 1.5 seconds talented w/o NG. Thus we arrive at 1489.6 DPS and 6.458 DPM.
Starfire: 120% coefficient. Thus (2000 x 1.20) = 2400 + 720 = 3120. Total 20% + 13% damage increase from debuffs = 33%. (3120 x .33) +3120 = 4149.6 damage on average. Mana cost lowered 9% to 505 mana. Cast speed = 3.0 seconds talented w/o NG. Thus we arrive at 1383.2 DPS and 8.217 DPM.
Wrath’s DPS factoring in crits, assuming a modest 30% chance for that spell, we multiply by 1.30:
(1489.6 x 1.30) = 1936.5 DPS; (6.458 x 1.30) = 8.395 DPM
If Wrath is buffed from Eclipse and has it’s damage increased an additional 10% then simply multiply it’s DPS and DPM by 110%, I believe, to get 1638.6 DPS and 7.104 DPM. A big DPS boost and DPM boost, but not approaching. If we factor in for crits (which I believe comes last in calculations) we multiply by the crit chance and get:
(1638.6 x 1.30) = 2130.2 DPS; (7.104 x 1.30) = 9.235 DPM.
Now, let’s look at Starfire’s final DPS and DPM with and without the buff. Without, we multiply our numbers by 1.30 at 30% crit:
(1383.2 x 1.30) = 1798.2 DPS; (8.217 x 1.30) = 10.682 DPM.
With the buff, we multiply instead by 1.40 and get:
(1383.2 x 1.40) = 1936.5 DPS; (8.217 x 1.40) = 11.504 DPM.
Let me retype the final numbers so we can look at them all together.
Wrath: without buff–1936.5 DPS; 8.395 DPM
with buff–2130.2 DPS; 9.235 DPM
Starfire: without buff–1798.2 DPS; 10.682 DPM
with buff–1936.5 DPS; 11.504 DPM
So, those are some preliminary numbers. At 2000 spell damage and 30% crit for Wrath and Starfire (26% on your character sheet) we see, well, those numbers. Whether or not you think Eclipse is worth it depends on how much mana you have, but obviously Wrath is better to cast before than after the buff. I won’t pretend to know whether this is good enough for raid situations or not. I’ll let you be the judge.
Some people have suggested dropping only 1 point in Eclipse because while it’s a nice buff, it’s not necessary. When it procs, use it. Otherwise you’ll be OK. I kind of like that idea, simply because there are too many good talents around that are also very nice.
I hope that helped.