Originally Posted by Tinava
Actually, I was hoping for folks with math skills to use the info above for some kind of analysis on the value of F&B over not using F&B, especially as it compares to using ISL as a tradeoff in the different builds.
Anyone with said math skills around who are up to it?
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Math for F&B, concerning the crit part can be found in an old post of mine
http://elitistjerks.com/1053473-post303.html
And it turns out to be < 1% crit chance due to all the random factors, this is a "per talent point" value. 5% being the ideal case value for a fully specced F&B.
For immo it's easier to do the math. If I'm not reading the talent wrong, it augments by 15% Immo's spell power coefficient (20% for direct damage part and 100% for dot, before F&B).
F&B is a great talent to improve immo, since, in percentages, it gives
+0.15*X/(460+0.2*X)*100 % (direct damage part)
+0.15*X/(785+0.2*X)*100 % (dot part)
EDIT: there's an error in the previous one, but due to a wrong assumption on how F&B works, I've redone the counts in a following post.
at 2k spell power it's +34.884% for the direct damage part and +25.316% for the dot one.
The higher your spell power, the higher the benefits. With a limit fixed at 0.15/0.2 = 0.75 for both parts (for the sake of the info, impossible to reach it of course).
When I analyzed your WWS back in page 11 (
http://elitistjerks.com/1050093-post257.html) the result of ISL+SL was that it awarded you 0.1568%dps.
You now have 2k spell power, unbuffed. I'll use 2k spellpower than. I know in raid you have more, but I don't know how much you had back than, but I'm pretty sure you were higher than 2k when raid buffed. If my point stands for 2k, than stand for higher values too, since I proved that the higher your spellpower, the better F&B performs on immo, which means an higher percentage of immo dps was due to F&B.
At that time it was 3.0.3, so:
1) You had no immo glyph
2) You had no conflag glyph (aka you lost part of your immo damage)
I don't know if you were specced F&B, I guess so and I'll use this hypotesys. If you weren't, all the better, since the actual percentage I'm using is lower than the one I should be using since your immo would have done more damage and thus the percentage for incinerate (used to evaluate ISL+SL contribution) should be lower than the one I used.
From my counts we know that F&B, for 2k spellpower, multiply the value of immo by 1.34884 (dd) and 1.25316 (dot).
Let's keep math easy. In both case it awards more than +25%. If it were to provide +25% than the total damage from immo you would have done, would have been 7/1.25 => 5.6% of the damage you did in the fight, which means that 1.4% = 7% - 5.6% is thanks to F&B.
Now, if we compare the values: 0.1568% dps vs 1.4% dps you see the difference is about one order of magnitudo.
Also note that:
1) You had more spellpower than what I used in my example
2) The percentage increse for immo contribution is underestimated
3) You lacked the 5th immo tick
4) You had no immo glyph (which is a good dps increase)
5) The dps increase for conflagration given by the crit increase has not been taken into account
6) If you ended the fight with more than 0 mana, than some of the mana you got from ISL was useless (aka ISL provided less dps)
7) Regardless that points 1-5 mean you got more than 1.4% out of 5/5 F&B, and that point 6 means you got less than 0.1568% from ISL, F&B still was (or would have been) on the order of 10 times more dps than 3/3 SL + 2/2 ISL.
Also note that petchwork is THE fight where ISL+SL can shine the most. ISL's value is calculated by estimating the number of Life Taps you don't need to do thanks to the mana gain ISL provides over the course of a fight, which means that in movement fights, if you can tap without losing dps (no instant spell to cast and the reason you are moving isn't going to kill you for the tap you are doing), than you cam tap without losing dps (which lowers ISL contribute due to point 6).
I don't want to get back to the discussion about the utility of ISL+SL, I think everyone understand when it's useful. We are discussing "how" useful it is, and more precisely, how useful is in comparison to F&B.
Of course a WWS isn't a proof, there's a billion things that could be argued about it, but if by underestimating EVERY single possible variable that would help F&B we still get a whole order of magnitudo of difference, I think it's highly unlikely that ISL+SL is better than F&B.
P.S.
Back at the time we were discussing about how we felt F&B to be a weak talent (and how poorly ISL was performing for us). As you can see in
http://elitistjerks.com/1050664-post270.html it was exactly those thoughts that caused MD/Backdraft to be born. Point is: you need either ISL+SL or F&B to reach CB, and by just looking at our WWS we know that ISL+SL works poorly dps wise in our 25 man raids. So we are stuck with F&B or we need to go for an hybrid build (without backdraft I consider the hybrid to be primarly demonology). Which brings us back to simulations (altough I haven't seen a MD/Backdraft simulation up to now, nor a WWS report for that matter, which would be interesting for me).