Yes, "no sp" meant no sp in group (changed in original post). Not bringing any sp would nerf every caster dps by at least 5% anyway, so there is no point to not bring at least one.
Both results were with a 1.10 cos or coe.
I'am not making any number, i'm just reading the spreadsheet.
Speaking of Sunwell gear we will see if there is any difference.
We take the following gear for example :
Head :
[Hood of the Malefic]
Neck :
[Amulet of Unfettered Magics]
Shoulder :
[Amice of the Convoker]
Back :
[Cloak of the Illidari Council]
Chest :
[Sunfire Robe]
Wrist :
[Bracers of the Malefic]
2H :
[Grand Magister's Staff of Torrents]
Wand :
[Wand of the Demonsoul]
Hand :
[Sunfire Handwraps]
Waist :
[Belt of the Malefic]
Leg :
[Leggings of Calamity]
Feet :
[Boots of the Malefic]
Finger 1 :
[Mana Attuned Band]
Finger 2 :
[Loop of Forged Power]
Trinket 1 :
[The Skull of Gul'dan]
Trinket 2 :
[Hex Shrunken Head]
Every Yellow socket is gemmed with
[Reckless Pyrestone]
Every Red socket is gemmed with
[Runed Crimson Spinel]
But we have at least 2 red socket gemmed with
[Glowing Shadowsong Amethyst] for the CSD
Enchants are the common ones, except for the weapon which will be Spellpower for comparison purpose.
I took the staff and not the Sunflare/Chronicle combo, because we cannot expect to kill Kil'Jaeden before at least 2-3 monthes.
With the exact same buffs i stated in my previous post, we have :
+ 1674dmg and + 80 shadow/fire dmg(flask) for a total of +1754 shadow/fire dmg
+ 205 hit rating (didn't manage with the staff to not being over the cap without losing dps)
+ 385 crit rating (including the 66 from ret pal)
+ 434 haste rating (including a bloodlust of 40s over 360s)
+ 354 mp5 in shadow, +376 in fire (gained from more JoW proc)
Loading the 0/21/40 Shadow preset and setting the ISB tab with 2 warlock having the same gear (~2s per bolt with 94% cast time, 16%hit), and 2 sp doing a direct damage (MB or SW: D) every 6.5s (what our sp are doing in raid), we have exactly 2800dps.
Loading the 0/21/40 Fire preset we have 2877.4 dps (or 2910.2 with flame cap)
So with sunwell gear, the difference drop to 2.76% in favor of fire spec, or 3.9% with flame cap.
In full sunwell gear, a sp will do 1700dps to 1800dps with a sham. We will assume 1750dps with a 70% ISB uptime (3 wl @ 35% crit)
If we count 2 sp and 1 shadow warlock instead of 3 in a raid, the isb uptime will drop from 70% to 55%, which is a 1-(1+0.2*0.55)/(1+0.2*0.70) = 2.631% dps nerf.
Each sp @ 1750dps will do ~1700dps instead, so a 50dps loss for the sp. If the shadow warlock is destru spec with the above gear and buffs, he will loose ~75dps.
So if we bring 2 sp and 3 warlock in a raid, having 1 shadow warlock and 2 fire lock will nerf the shadow users by a total of 175dps, while upping the fire warlock by 80dps for each one, or 110dps chaining flame cap.
This give us a
15dps loss (or a 45dps gain with flame cap on cd). So with sunwell gear in mind, going from shadow to fire for 2 locks on 3 is not a dps gain for this raid.
I always assume there is at least 3 warlock in a raid, to have cos/coe/cor for every bosses.
If we want to play more with numbers :
With 1 sp in raid, ISB uptime is 76% with 3 warlock shadow, 73% with 2, 65% with 1
1 shadow priest + 3 warlock shadow = 1*1768 + 3*2827 =
10249
1 shadow priest + 3 warlock fire = 1*1535 + 3*2880 (+3*30 w/ flame cap) =
10175 (10265 w/ flame cap)
1 shadow priest + 2 warlock shadow + 1 warlock fire = 1*1759 + 2*2815 + 1*2880 (+1*30) =
10269 (10299)
1 shadow priest + 1 warlock shadow + 2 warlock fire = 1*1735 + 1*2775 + 2*2880(+2*30) =
10270 (10330)
With 1 sp, the global dps is pretty much the same (0.2% max gain without flame cap, 0.8% with).
With 2 sp in raid, ISB uptime is 70% with 3 warlock shadow, 65% with 2, 55% with 1
2 shadow priest + 3 warlock shadow = 2*1750 + 3*2800 =
11900
2 shadow priest + 3 warlock fire = 2*1535 + 3*2880 (+3*30) =
11710 (11800)
2 shadow priest + 2 warlock shadow + 1 warlock fire = 2*1735 + 2*2775 + 1*2880 (+1*30) =
11900 (11930)
2 shadow priest + 1 warlock shadow + 2 warlock fire = 2*1700 + 1*2725 + 2*2880 (+2*30) =
11885 (11945)
With 2 sp, we have at best the same dps with only one fire lock, and have a 0.37% dps increase if we have 2 locks chaining flame caps.
Those numbers are assuming 35% crit destru warlocks (with a ret pally in raid).
We have to take into account the mana return increase provided by a sp with a higher ISB uptime (50mp5 more for a 1750dps sp instead of a 1535dps one). In a warlock pov only being in a sp group, +50mp5 is ~15 more dps.
What we can conclude, is that if we have only 1 sp in a raid, we must have
at least one warlock shadow, and if we have 2 sp,
1 warlock shadow at least is required too.
Every other warlock can be what he wants to be : it will have nearly no impact, even if fire for a 4th warlock would be a litlle better.
All in all, in sunwell gear, the real advantage of being fire is the use of flame cap over runes (which i didn't take into account of, because it seems a real pain in the ass to farm).