New suggestion;
The Prestige Shop!
Where you reach combat 99 in each combat stat which are-
Prayer, strength, attack, defence, constitution (Hitpoints), ranged and mage.
And you are given the option to reset all of those stats for prestige tokens which can be used in a certain shop called the "prestige shop" which can have various items inside of it.
It was very popular on a very old server i used to play and got people very addicted which means, more fun and a great active server!