WOW Gold: AGI can attack very fast but ammonite can only go to max 2000+
Battle smiths (optional): Battle smiths have two types, STR/VIT and AGI. Currently the STR/VIT is the strongest but low attack speed; their ammonite can go to 4000+ WOW Gold per hit. AGI can attack very fast but ammonite can only go to max 2000+. If you want to get, get 1 will be enough.
Priests: If a MVP party does not have priest, then it is useless, find 2 or more, the more priest the more support you get.
Wizards (optional): The reason I name it as optional you can kill an MVP even without a wizard, but if you want to kill more faster, then you can find 1 more, the max is 3 to 4.
Assassins: This AGI character is a complete must to have in MVP party. Find critical types or dagger types, 1 or 2 is enough, you need to save space for other class too.
Bards (special): This class comes in use when there are wizards in your party, bards can increase the wizards casting time with the poem of barge skill and other skills to support the party.
In this special case, find bards only if they are wizards in your party if you can find 1, because it is very rare to see bards around.