So, I like all my formulae too much to choose between which ones to prepare and which not to. I swapped the monster feats for Martial Stance and Extra Prepared Formula, but that only adds one extra, still leaving me with 2 unprepared formulae.
Is it worthwhile to keep the Child of Shadows stance to gain concealment round-to-round? I foresee myself moving around a lot, and with potentially two move actions, I can even take two 5-ft steps in a round to gain the concealment without provoking AoO's.
On the other hand, I may not even move all that much, or I may end up teleporting more than moving around, meaning Child of Shadow likely wouldn't trigger.
An extra formula to choose from could be very handy, especially since they all play off one another so well.
Thoughts?