Not sure if its even possible with the engine this game runs on but...
What about an alt killing mode. ??
Explanation of my thought.
Instead of killing a single mob then 6.5/5.5 wait for the next mob with full life, you can choose alt mode.. which is continual/chain attacks till you die/0 hp. When dead/0 hp you get a 10 second timer, which you can chain attack again. No auto (or maybe low auto count .. like 5?)
Obviously you wont be able to chain more than what you currently single kill then life resets, but you step down a mob or 2 .. for lower exp and gold, but kill a few more. You would be living off the RNG.
Just an idea to make a good little game a bit of a curve.
1. we have autos 2. we don't have much of a healing hp based system, so your autos would either run indefinitely which is a strain on the server or would run for too short of a period and would be more useless than the autos we already have.