Post by Dunsinane
but, while more stamina prevents a loss of DPS you can't say that stamina should have a value in terms of increasing DPS.
this sort of theorycraft is done in a vacuum and you always need to temper it to real situations. it's about working out potential and knowing what it's worth working towards next.
With
Demonic Knowledge stamina does provide a minor direct DPS boost.
candlepimp's guide is aimed at destro locks with some side notes for affliction locks but it has nothing related to demo locks
To borrow from the Elitst Jerks Warlock Compendium, because I have dinner to make and Kara to run tonight... ;-)
Demons get a Stamina boost equal to 30% of their owner, same for Intellect, which translates into 15% Spell power.
With talents:
1 stamina on items =
1.15 stamina on Warlock (Demonic Embrace) =
0.3968 Stamina on Demon (Fel Stamina 15%, Demon Sta contribution 30%) =
0.0595 spellpower (15% Demonic Knowledge)
0.0720 spellpower with kings on both demon and owner
So 1 sta = 0.072 spellpower with BoK.
It also boosts your Succubus hit points with 2.9 without kings (update needed for Felguard, can anyone tell me the stamina to hit point conversion? It's demon dependent, Succubi get 7 health per sta)
1 intellect =
0.345 int to demon (Fel Intellect 15%, Demon Int Contribution 30%) =
0.052 spell power (15% Demonic Knowledge)
0.062 spell power with kings on both demon and owner.
So with Kings 1 int = 0.062 spellpower (and 0.3 crit rating, as listed further in this post)
Gearing for Stamina or Intellect in order to obtain higher spellpower through Demonic Knowledge will yield very insignificant returns, especially compared to how buffs like Fortitude and Arcane Intellect on the demon will affect it. Because of this, Stamina's only real function is to give you (and to a lesser extent, your demon) a larger health pool.
In other words, for the most part demo locks can gear effectively using the same approach as any other warlock. Stamina and Intellect have absolutely minor effects on your damage output.