Firstly, I apologies if this idea or a similar one has already been posted.

I think it would be an interesting idea to have mobs leading up to bosses in dungeons reward players with Allagan Tomestones (Philosophy / Mythology) if the party can reach a certain chain in killing the mobs. This could get players to have a new challenge to kill the mobs leading up to bosses in a fast but risk taking manner. In addition, this would make these mobs feel much less of just a grueling task.