My experimental destro-lock talent tree.

Link: http://wowtal.com/#k=BlH5KtO.a5o.warlock.qCvmBo

This is the talent tree I use for my destruction warlock. And as I said to my class leader, it looks like someone who didn't know what spec to choose has sprinkled the points all over the place. But here are my thoughts behind it.

First of all, this is a destruction build so the destro branch is more or less a standard build, we want Shadowfury and Chaos Bolt but skip some things like Backlash, which is pretty useless now when we have Fel Flame. We skip Nether Ward/Protection and place those points in Demonic Embrace instead. +7% stamina vs. 7223 spell damage absorbed kind of balance eachother out.

In Demonology I want to have Demonic Embrace and Dark Arts. Both are very nice and I'd be glad to spend  more points on them but I need to save some points left for the Affliction branch. You want Demonic Embrace for the stamina and points in Dark Arts will turn your Imp from a sluggish little hang-around to a fierce fireballing demon. We skip Mana Feed and put the points in Improved Life Tap instead. Would the Imp run out on mana, since it won't get any from our Life Tap, we can always get a new one with Soul Burn + Summon Imp.

Six points left and we get to the Affliction branch. We spend some points to get Doom and Gloom and a little Improved Corruption. Since we where a bit cheap in the Demonology branch and didn't get the full +10% stamina we spend some points on Improved Life Tap so that we won't tap ourselves to death during fights.

And then, the pièce de résistance; Jinx.

"Jinx Rank 1

Your Curse of the Elements also effects up to 15 nearby enemy targets within 20 yards of the cursed target. Also, your Curse of Weakness reduces the targets energy, rage, focus or runic power generation by 5% while active."

All mobs standing near the mob with Curse of the Elements will get Jinxed. (But will not be aggroed.) This will give them a debuff that increase damage taken from magic by 8%. CotE on a target and you and the other casters will AoE those mobs down quicker than ever before. :)

I'm sure this is not "The Destro-build" cause we've made a few sacrifices on our own dps and survivability. But I think it is valuable to look further than just your own personal dps and see what you can do for the group. With the realease of Cataclysm I get the feeling that warlocks have turned from being, more or less, braindead, aggro-hogging, healer-leeching dps'es to have a more central role. We can Fear, Banish and Enslave Demons (all at the same time), hand out Healthstones and Soulstones, summon people and give a nice boost with Dark Intent. So giving all casters a +8% on their damage seem, to me, something that fits even a destruction warlock quite well. :)

EDIT: I do miss Mana Feed a little. But as long as I remember to cast one of my Improved Life Tap everything is ok. (And remember not to stand in any fire.)