Reason to implement them.
Considering every time you want to kill either of the 4 group bosses that currently are in the game, you have to search for a team for ages, why not implement a system that would allow players to find teams easier to kill a specific boss every month and then reward them if they reach a specific kill count of each boss or place top of the month on that boss' kill count?
This would make completing slayer tasks for some bosses easier and would encourage newer players to kill these specific bosses.
How it would work.
Every month there would be a hiscore for one of the 4 bosses (nex, kal'ger, yk-lagor, har'lakk). Because there would be a hiscore for only one of those, this would allow players to grind out their wanted items from that boss in the time given and if they place top 3 each month, they would get a rare cosmetic reward. Once the month is over and the champions of the boss are decided, another boss would come into the rotation for a month. This could be an ongoing thing or it could last for only 4 months.
Rewards
Besides being able to get the rewards from each of the bosses easier, players would be added to the group bosses' hiscore's list, which could be viewed on forums or in game through viewing orbs, which would be placed in each chamber that the bosses reside in.
The rewards for the winners of each month could be gilded items from the voting boxes (because they are so rare at the moment), dyes, titles, capes or other cosmetic items.
