What can your Demonology Warlock do for you?

So since the Warlock forum has received no love yet, I thought I would provide some.  I recently switched from Affliction to Demonology because it provides many more raid buffs, in addition to competetive dps.  With the most recent patch, all 3 Warlock trees are only separated by a few hundred dps, with Affliction squeeking out a narrow lead over Destro and Demo.  I'll briefly list the raid buffs that all locks can apply, but I'll focus on Demo specifically.

Affliction:  Provides a 5% crit debuff via http://www.wowwiki.com/Improved_Shadow_Bolt.  Affliction is the slightly better choice to keep this buff up than Demo, and vastly better than Destro (as Shadow Bolt is not part of Destro's casting priority).  The Felhunter (Affliction pet of choice also provides a Spirit and Intellect buff if a priest and mage aren't around to overwrite it (which is often the case) via http://www.wowwiki.com/Fel_Intelligence.  The felhunter can also interupt and devour magic via http://www.wowwiki.com/Spell_Lock and http://www.wowwiki.com/Devour_Magic. This requires some close pet management, so if other classes are present that can do these things, all the better.  When I was affliction, I found it pretty tough to micromanage those abilities, so I generally left them on autocast.  A more skilled lock might not find it as tough, however.  Afflocks also provide Healthstones (untalented) and Soulstones.  Most damage is done via damage over time and takes time to build up.

Destruction:  Can provide replenishment if specced into it (http://www.wowwiki.com/Improved_Soul_Leech), as well as a stun via http://www.wowwiki.com/Shadowfury if specced into it.  Shadow Fury is more widely seen in PvP specs for Warlocks, it isn't guaranteed to be in the repetoire of all PvE Warlocks.  The Imp is the Destro pet of choice and can provide a health buff via http://www.wowwiki.com/Blood_Pact and a fire resistance / damage aura called Fire Shield (http://www.wowwiki.com/Fire_Shield).  Destro locks can also provide Healthstones (untalented) and Soulstones.  Most damage is done in a more "bursty" fashion than the other specs.

Demonology:  The Demonology 'lock provides the best spellpower buff in the game via http://www.wowwiki.com/Demonic_Pact.  It's uptime relies on my pet making critical hits (The Felguard is the Demo pet of choice) and my Spellpower.  My Felguard crits at about a 50% rate, and in combat, my spellpower is regularly between 3500-4500 depending on procs.  That's a 350-450 spellpower boost for all casters / healers.  My Demonic Pact buff generally has a 95% - 99% uptime during combat.  I can also provide the 5% crit debuff via http://www.wowwiki.com/Improved_Shadow_Bolt, but during the execution phase, I lose DPS by casting Shadow Bolt.  That's why the Afflock is the best at providing it.  I am also talented for improved healthstones via http://www.wowwiki.com/Improved_Healthstone, and I can provide Soulstones as well.  I depend FAR more on my pet for my overall DPS than the other 2 specs.  My Felguard can do 1500-1800 DPS on his own in a raid, almost double what the other 2 specs pets do.  Luckily, I'm talented to be able to resummon my pet in less than 2 seconds if needed.  The other 2 specs have an (8 or 10 not sure) second cast to resummon theirs.

All Warlock Specs:  Can provide a magic damage debuff by casting http://www.wowwiki.com/Curse_of_the_Elements, but we don't want to if we don't have to.  Having a Balance Druid http://www.wowwiki.com/Earth_and_Moon or Unholy Death Knight http://www.wowwiki.com/Ebon_Plaguebringer provides the same debuff without a hit to personal DPS as that debuff is part of their regular rotations.  It is a personal DPS hit to the Warlock casting it, but if there is no Boomkin or Unholy Deathknight, it benefits the raid more than it costs the Warlock, so we cast it.  If all 3 Warlocks specs are present in a raid, the Destro lock would take the least hit by casting CoE, followed by Demo, then Affliction.  Affliction is talented into Curse of Agony, so if any other lock is present, they should be casting CoE.  Destro is a better choice because the high spell power levels of Demo make Curse of Doom harder hitting for a Demo lock over a Destro Lock.  Warlocks can only have 1 Curse on a target at any one time, hence the priority of specs to cast it.

If you are a Shaman:  And there is a Demo lock, you don't need to put down Flametounge or Wrath totems.  Our spellpower buff is better (as long as the Demo lock's personal spellpower during combat is over 2800 (for Wrath, Flametounge is less), and doesn't stack.

If you are a Fire Mage:  Yay for you!  No scorch duty for fire mages!

Demonology locks don't have talent points to spend in +hit talents, we Demo locks like to see Balance Druids and Shadow Priests in the raid, both which provide the +3% hit for spells that Demo locks can't talent into.  Destro and Afflocks both have available talent points to spec into the +hit stuff.

Addons:  We all kinow about DBM, Recount, OMEN, EPGP, blah, blah, blah.  But I CANNOT live as a warlock without a couple.  http://wow.curse.com/downloads/wow-addons/details/tidy-plates.aspx and it's dependency, http://wow.curse.com/downloads/wow-addons/details/tidy-plates-threat-plates.aspx.  These show me threat on ALL mobs, not just my target.  Extremely useful.  Also, http://wow.curse.com/downloads/wow-addons/details/fortexorcist.aspx.  It has all the tools you need as a Warlock, and is useful for other classes as well.  And lastly, http://wow.curse.com/downloads/wow-addons/details/powerauras-classic.aspx to keep good track of procs and such.  Maybe some other time I'll go over how to set up those three addons, but that's a thread for another time.

If anyone has any corrections or additional suggestions, bring 'em on.  I'd love some feedback on whether this is useful or not.  Enjoy!