[Maleficence]

Four friends and I are looking to start playing WoW together as a group with the aim of doing 5-man content. Towards that end we're trying to figure out what classes we can choose to get the most for our effort.

Granted most team compositions can work given skilled players there are probably combinations that have better synergy. Most of my friends aren't terribly "hardcore". So whatever will work with the least amount of effort would be optimal.

Currently we're aiming for:
Paladin/Warrior
Rogue (Combat)
Mage (Fire)
Shaman (Resto)
Warlock (Affliction)

There seems to be some hesitation on playing a warlock, so what could be a good substitute?

I'd like to have other opinions on what might be the best configuration given our situation.