The healthiest way for all this to end is to remove kishin and boost exp/mesos/loot/rewards to other areas of the game. Like, oh idk, P A R T Y Q U E S T S . Add more guild skills that would increase rewards when bossing with guildmates or something. Anything like that. Changing kishin in any other way but removing it is just side-stepping the irrevocable problem that I'm sure Nexon has tried to make work for a long time now.