So I found this macro that gave you a different demon skill based on which demon was out at the moment, and I made it awesome!

/petfollow
/focus [pet:Succubus, target=focus, noharm]
/cast [pet:Succubus, target=focus] Seduction; [pet:Felhunter,button:2,target=player] Devour Magic; [pet:Felhunter] Spell Lock; [pet:Voidwalker,combat] Sacrifice; [pet:Voidwalker] Consume Shadows

I made it use focus and allow me to reapply seduction before it expires (Pierce will like this one). Actually, the succubus functionality is the only part I really changed, but I still think I'm awesome for making it work. It was a bitch.

I added all the focus details, and the /petfollow line at the beginning. I also rearranged it so I could minimize the number of /commands and therefore the number of characters.

There's also this one, entirely original, that sets up a decent buff rotation for Demonology builds and also casts UB and DI if you're targeting a friend. All in one button.

/castsequence [help] reset=target,6 Unending Breath, Detect Invisibility; [pet] reset=6 Fel Armor, Soul Link, Unending Breath, Detect Invisibility; Fel Armor, Unending Breath, Detect Invisibility

If you need UB or DI fast, just target yourself. If you've got the time and mana, renew your Fel Armor and do the whole rotation without a target.

This one I think everyone should have.

/use [flyable] Silver Riding Nether Ray; summon Dreadsteed

Summons your flyer if you can fly and your land mount if you can't. Substitute your own mounts, of course.

This works for Warlocks because, while the Dreadsteed is a spell and not an item, the /use and /cast commands are interchangable.

Also, since I often have a Spellstone equipped in place of my wand, I wrote thusly:

#show Shoot
/equip Jeweled Rod
/cast Shoot

Simple enough. Substitute your wand. The #show Shoot command makes the icon show the same thing that would appear in your spellbook under "Shoot," that is, it shows whatever you have currently equipped in your ranged slot.

More coming soon