For the missions, levels and classes don't matter at all. Before you enter a mission, a window should pop up asking you what template you want for the mission. For examle: In the Shadowmane Invasion, you get the mission and before you enter, a window should come up asking what monster you would like to be. For this one, you can be either a 65 Monk or 65 Rogue. For every mission, it shows the level, class, stats and abilities of the monsters. Also, there is a little number next to the monsters you can select. For this one, your group can either be all Monks, so next to the monster name, it would have a number. Like this:
<Monster Name> (6)
Whenever someone selects that monster, the number will go down, so if there were 6 and someone chose that template, it would go to 5 instead. Once inside the mission, go to your inventory and click the "Alt Advance" button, you should either have Monster Innates and/or Monster Abilities. Spend your monster points, set up your hotkeys (Alt+H) and follow instructions. For the Shadowmane Invasion, after everyone is set up, walk a little past Commander Darktooth. He should say something like "Go forward foul creatures..." or something along the lines of that. In a few seconds, some Shadowmane guys (vicar, priest, etc.) and some Ragepaw guys should spawn and start killing each other. Only attack the Ragepaw guys, DO NOT use Enraging Bellow as it will aggro your allies as well. After each group of Ragepaws, follow and assist Commander Darktooth, normally he takes the right path first. After he kills one of the Elder Ragepaw guys in the right cave, he'll run back and go into the left cave, he runs up the ramp and around, you don't have to, after the second Elder Ragepaw, Darktooth should die. Don't worry, just follow the Shadowmane pack, they will always respawn. After the third and last Elder Ragepaw, look for a small box, it should just be called "a box" and be in a corner. It will have some explosives in it and a reward. One person take the explosives and do whatever with the reward. Next, go out of the room and go right, you will have to fight some Ragepaws on your own, after they're dead, whoever has the explosives, go right to a door and drag the explosives to the door, click and click "Yes". Run back to the group and wait for the door to explode. Walk in but DO NOT rush the savage lord. Select one person to attack him, as soon as that person attacks, have them use Whirlwind. Bring the savage lord to the group. Select another person who will Taunt and Whirlwind when the first person dies. After the first and second people are down, whoever gets aggro next uses Whirlwind. When the savage lord gets to about 10%, you'll be zoned to Undershore and get some dialogue that says something like "What happened? What happened indeed...(something else, can't remember)" That's the end of the mission there, the person that got mission may have to talk to Scout BristleThorp afterwards.
This has officially turned from an example/explanation to a guide :P anyways, hope this helps...
