Here is a guide for the 3v3 map. It will in detail explain the basic strategies for playing on the 3v3 map on Heroes of Order & Chaos.
Overview of the map:
It is a pretty simple map, with a few gank places above each tower, 2 dragons that can give you buffs and generally plays out like a direct slogging match between the opposing teams. It is perfect for new players just getting into the game and those who do not have as much time to spend as they would for a 5v5 map.
It usually takes 6-20 minutes to finish the game depending on various factors.
Gameplay on the map:
The strategy is very simple, you need 2 members of your team at the tower to start with, preferably one ranged class dps/mage/ and finally a support. The third member of the team (another damage dealer) should attack creeps around the map to ‘jungle’ and attempt to gain a stealthy level advantage, assuming all three opponents are pushing the middle which is very common in this map.
This is mostly a tug of war slug match, but at level 6 with arcane mage, or level 7-9 (generally speaking) you will want some one to attack the dragon at marker X, pop back up to the middle of the map and use the buffs advantage to the teams favour.