Someone knows where to position aether fountain?

I'd recommend changing the map completely. It's really easy to bait the characters.

I recommend the map spring breeze since having the indestructible walls, you can have a funnel style base plus make it hell with traps XD but while im on that, the trap (not the building) that does aoe damage can also harm your defense team so watch for that.... Also i believe people have noticed that the fortress acts as a indestructable wall but i dont know if a catapult can pop it......

In a corner. With wall to force the enemy to walk a path. With units to welcome him.

Also, if you use a cavarly team, give them room. Your setup corners your own team instead of the opponent's.

Usually in the top left and topright corner of map away from each other. It forces one of their character to separate from group if they want the bonus points which is usually the case.