Editing Kronik's Colosseum Guide (section)

=== Grouping ===
:Any combination of characters you can win the colosseum with but, different combinations will make it easier or harder to win.  Mages, Melee, and Ranged weapons are all available to you to choose from.  Void magic is a new type of magic and is useful in the colosseum so don't count them out.  A good high level void mage with slayers will really help especially with their Damage Over Time spells which increase the amount of damage that can be done for up to a 26% increase.  You will need a minimum of 4 war mages, after that it is up to you as to what you bring as long as it includes 2 melee/ranged toons.  That brings your total up to 6, leaving you 3 more to fill up.  With the combinations being massive as to what you can bring I have found that 5 mages and 4 archers work really well, of the 5 mages 4 being war and 1 void being a good alternate as well to just 5 straight war mages.

* '''5 Mages, 4 Archers''' (Ideal)
* 5 Mages 3 Archers, 1 Melee
* 5 Mages, 2 Archers, 2 Melees
* 6 Mages, 3 Archers
* 4 Mages, 3 Archers, 2 Melees
* 6 Mages, 2 Archers, 1 Melee

'''Note:''' There are even more successful combinations then what is above including Void Mages.