I recently started marking when I switched to prot spec and started working as a tank. I assign marks to each of the party members ("Hunter guy, you take the star; rogue, you take the orange circle; mage sheep the X, etc.). The skull is always me, and I usually put it on the biggest, strongest mob. I put hunters and long-distance casters on mob casters and distance threats. Everyone has someone to kill, and when they finish, then they come help me. Any mob not marked can also be assumed to be my responsibility to at least hold them on me until the others can join in. I hold threat pretty well, but once the others start in, particularly the hunters, it's hard to hold all the mobs. But most players can handle a 1-on-1 situation if it's not a boss.
I will often take the farthest-away mob for my first target. I do a ranged pull to get their attention, then when they start to come after us, I Charge towards the back guy so I end up in the middle of the group. Then I'll start laying down some thunderclap and shouts before everyone else joins in. If my party holds off for a few seconds, it works very well.
I read a lot here about using marks to determine kill order (skull = 1, X = 2, etc.). That usually means that the entire group is only focusing on one mob at a time and working through them individually. This makes the fight last longer, no? If each person takes their guy out simultaneously, then helps me finish off the leftovers, it seems more efficient.
Am I looking at this incorrectly? I can see how fighting one mob at a time as a group might help keep the entire group of mobs focused on me instead of the squishies because nobody else is attacking them, but then the healer has to work extra hard to keep me alive.
On the other hand, if everyone is taking a beating, they have to heal everyone at the same time.
Snackpants, Female Night Elf Warrior, Echo Isles
My allies are my weapon; I am their shield.