Role Show/Hide Button like to the left of the form save or left side where lvl all crusaders is that you can click one of xx button to show crusades of said role or hide them

DPS | Buffer | Tank | Debuffer | Gold Finder(may be buffer)

Clicking DPS would then pop out all non DPS role saders and pop in all DPS saders from the bench (ie emo hermit etc)

Click Buffer would do the same (ie jim robot turkey sasha etc)