lots of modes have been suggested.. i was thinking of makin a mode or a built in arena system into chf. so that every few minutes, the whole game stops, basically paused and 2 heroes r chosen depending on whoever has higher hero kills from each of teh 4 teams. BOUNTY in this arena time is increased to twice as much. WHoever wins of the 4 heroes gets an extra tower, item, or 1/2 k gold.. this way 3 heroes can team up and kill the top dog, thus giving the other three teams a chance to catch up... AND IT WOULD BE A NICE ADDITION... if u still don't kno wat im talkin about there is a map called arena nexus, angel arena allstars, angel arena morphed... all these maps have a great arena system...
BUT THE main thing should be that if u die in the arena, ur automatically placed where u came from...
SO FOr EX, somebody's casting starfall
arena fight starts and he is teleported to the arena
he dies
he is returned to his casting
nothing is damaged in this arena mode so ur earthquake or something else is not actually effecting bases or units........... but when one hero wins he is returned to his normal casting, at the same point the arena fight started....
GREAT ADDITION 
the main arena could be the middle and everything is automatically cleared from that area. THE FIGHT should last 2min at the max and then all the people are killed and have to revived at a base... so it is at ur advantage to kill the people.
