without you being more specific about your pugged members I would say
Group 1
prot 1
prot 2
holy pally
Hunter 1
Hunter 2
Group 2
Holy Priest 1
Holy Priest 2
Ice Mage
Random 1
Random 2
You see the issue is that the classes there provide little to no group buffing utility. The pally goes witht the tanks for the devotion aura buff, but thats about it.
The way you go about organising it is to look at the overall group and see who can buff who. For example, if you had a rogue, it would go with the tanks for battle shout. If you had a shadow priest, you'd put it with the healers and spell casters. If you had a warlock it might go with the tanks for blood pact, or if it was a demonic sacrifice spec you might deprioritise that. If you had a feral druid it would go with the melee, as would an enhancement shaman or ret paladin. Resto shaman and elemental shaman buff spellcasters more so those would be a priority.
To be honest this list could go on FOREVER. Instead try to buff key characters like tanks and healers if they are lacking in some way. At the end of the day you basically have to learn about other classes and their builds so that you can decide for yourself how to distribute them properly in your groups.
Edited, Jan 16th 2008 8:16am by thegreatmothra