Since square is having a hard time balancing selfish dps and support dps, they should just make everyone into selfish dps.

Make all party buffs given to dps only work on themselves and tune the dps of each class to be similar in damage with some variance.

This makes the game far easier to balance, while keeping the gameplay similar to what it is except each class burst window is dependent on the classes optimal time to use it vs alignment of burst windows of the party. An example would be on RDM with selfish embolden vs raid embolden.

This simple solution fixes the dps balance issues and creates a system that a players dps is all in their own hands and can't be dragged down by party members not aligning buff windows.