Great map, i hosted it, everyone loves it and its becoming popular.
Found 2 bugs:
you can grab the ball and release it before a round ends and then at the start of the next round, someone can land on top of that ball and die.
When 2 people grab the ball at the same time one of the guys get a thunderclap spell that does damage and can spam it for that round and it happens often and i always have to tell them not to use it.
Ideas
More arenas: walls that can rebound balls, portals, obstacles.
Add skills: stun,slow,toss,blink.
Different balls: timed detonating, sticks to people turning them into a suicide bomber, heat seeking, speed, bounces off people, shotgun/spread shot.
Add runes: speed, invun, invis, global slow/stun, heal.
More events: everyone invis, grunt that u can throw but attacks the closest guy, spawn visible mines, felhound that chases the ball until it attacks it and it explodes.
More game modes: Teams, king of the hill where you get points only for standing in the middle but it doesnt spawn balls in the middle, Rambo where the rambo is buffed and the killer of the rambo turns into the rambo.
Tips
Remove the gravity shock event, it is a waste of an event and should be replaced.
The thing where u can get exp is useless, should be that only the killer gets the exp and should add skills to level skills, and not get random stats for levels.
People start complaining when theres 2 guys left and it takes 2 minutes for them to kill each other, definately add some sort of sudden death.
When the imba ball is being created people start grabbing the balls used to create the imba ball and they get confused, make another less confusing animation.
Remove the ball at least 10 secs before the an eventball is created.
I dont know if this is a bug or not but when you're holding the imba ball and you hit someone, the imba ball effect triggers but the ball is not destroyed, i got the same imba ball effect 3 times before i threw the ball and hit someone to get a 4th effect, if its a bug fix it, if not then its pretty hectic.
Other than that its great fun and awesome gameplay, fix bugs and use tips and ideas before it becomes popular just as it is.