SE

Here's a simple solution that you may already be implementing with the upcoming hotfix:

1) Make ANY dungeon you queue for, so long as you are level 48+ (because I believe Aurum Vale gives a few right now as-is) award Tomestones of at least Philosophy. This would spread the queues out across all the different dungeons, would shorten queue times for many of the other dungeons and would add some very much needed variety into the tomestone farming process instead of standing in Revenant's Toll all day and spamming /sh LF CM speed....