Apperently I was tired as hell when I read your first post. Have no idea what I thought :P
I use a assload of addons but most of them are to save up screen space. Ones that I use for my shamman only are:
FloTotemBar - Just makes four separate bars, one for each class of totem. The totem you have dropped at the time is highlighted and there's a little bar counter on the side of each bar letting you know how long you have left on that totem.
Grid - I'm not a big fan of healbot. I used it all through 3.0 and up through lvling to 80. When I started raiding again I went back to grid and click to cast. If set up right (and I'm sure you can do all this too on healbot, just wasn't comfortable with it), you can have the little boxes fade in and out when they are in healing range, let you know who has agro, and let you know if a person has a disease or poison on them. It's small and takes up little screen space as well.
Parrot - While I use MSCT on all my other toons, I like parrots combat text on my sham a little better. Rather then having your damage taken and healing dealt scroll in a designated spot on the screen, it instead pops up above a targets head. This way I can see who got all 4 of my chain heals.
EavesDrop - Pretty much a on screen combat log. Little window with incomming on the left and outgoing on the right. Great to see who you healed and for how much and with what spell, as well as seeing just how hard Saph hit you when you screwed up.
Quartz - So i can put cast bars wherever the hell I want.
HealAssign - great for setting up healers in a raid and letting everyone know who they are healing.
Buffalo - With all the buffs going around now days as well as debuffs you need to keep a eye on (thadius), this addon is great for putting your buffs/debuffs where ever you want them.
Everything else is pretty much normal addons. I use PitBull for UFs, Fubar, Bartender4 for bars, BigWigs boss mods, Omen, Prat for chatframs, simpleMiniMap, eePanels, Recount, and a few other small ones.
Keep in mind that more addons = lower performance. I have a great computer to be able to run all of these and I'm still turning down settings in a 25 man raid on some boss fights.
Edited, Dec 30th 2008 1:59pm by DarkHybridX