I am trying to land 99 Summoning while Enlightenment Aura is up.
I am currently at 9684577xp, level 95. I'm counting crimsons just for simplicity.
96: 478 Iron Titans
97-99: 7931 Pack Yaks
4205 Crimson Charms required with Aura
1179 Crimson Charms banked
3026 Drops required
7 Aura resets left (from today)
433 crimsons per reset