Can't focus

Thanks to the Christmas holidays I've been again playing a lot again. But the problem when you have 10 alts is the difficulty to focus on just one. Sure, I've been able to get some of them great new shiny loot, but after 5 or 6 random heroics with a char I get bored of it and need to switch to another. But then if I go on a dps char I need to wait several minutes to get a run, so I've been focusing more on my druid and shaman healer. The last one specially got 3 pieces of t9 now (when previously only had ilevel 200 gear) but still I don't feel quite comfortable with it. It's good at throwing small heals, but Chain Heal takes ages to cast. And when checking the available totems from the vendors you see all focus on Chain Heal... bugger. So I'm still using the old Totem of the Plains. Anyway once I got the fourth piece of t9 I'll guess I'll get one.
On the other hand we did some Icecrown Citadel raiding, since everybody wanted to grind some reputation to get the ring. After a pair of cleanings (without any rogue to see the traps that spawn these giant skeletons) we decided to try the first boss, Lord Marrowgar. As usual only two or three guildmates had read about this boss, so we decided to try and what was this about. I must say that we did great on first try, bringing him to 14%. Quite impressive for a bunch of casuals. On second try we had a silly wipe at start and I could only hold his damage for some seconds before I went splat!! on the floor. But at the third we did it and kicked Marrowgar's bony ass. Not only that, he dropped a tanking mace and a pair of pally boots and I got both items (yay!). After some rep grinding I also got the ring, so now I'm very happy with my paladin.
Now, on what char should I focus? Decissions, decissions...