I really don't understand what it is you're saying you don't get.
You stack up enough various discounts so that bestow power costs less than it grants. You then use bestow power, costing, let's say, three power points, and you get four four power points, for a net gain of one power point per action(this can of course be optimized to give many more PP, but you get the idea). You repeat until you have the desired number of PP.
It is simple in theory, but is not that simple in practice though. The Devil is in the details.
OK, so let's start with Bestow Power. You get 2 pp, when you spend 3 pp. If you can reduce the cost to 1pp, you gain pp. But Midnight Augumentation only reduce the cost to Augument, so this is no go.
So, let's start Augumenting Bestow Power. You get 4pp, when you spend 6 pp (3 for the base, 3 Augumentation). If you can reduce the cost to 3pp, you gain pp. However, Midnight Augumentation can only reduce the cost to augument to down to 1 but no further. So, only with Midnight Augumentation, at this level, you still don't get ahead. Let's go for more...
So, you get 6pp when you spend 9pp. If you can reduce the cost by 4, you gain pp. So Midnight Augumentation must be 4-essentia variety. So in the very basic level, this requires ECL16 (Midnight Augumentation can receive maximum of 4 essentia at ECL16), and ways to have 4 essentia (Midnight Augumentation provides 1, Incarnum Race like Azurin provides 1, and Bonus Essentia feat grants 2). Now, if this comes online at ECL 16, it's a bit too late. There are so many better things we can do at this level, we need to have this coming online much earlier...
Improved Essentia Capacity will bump the maximum essentia capacity of feats by one. So, by spending another feat, we can have this coming on line at level 11.
So, at this point, we have a skeleton of Azurin+Midnight Augumentation+Bonus Essentia+Improved Essentia Capacity -> Level 11 power point recharge. Not bad, but not great. Can we do better?
Instead of exclusively relying on Midnight Augumentation, maybe finding other ways to reduce cost? Metapower: Link Power (pp1 Power) comes to my mind. Now, if we can reduce get 4 pp, by spending 6pp down by one more, this might work. Midnight Augumentation at ECL 6 reduces this by 2.
But wait...metapsionic feats like Link Power requires spending Psionic Focus. And reducing Augumentation cost using Midnight Augumentation also costs Psionic Focus. So we need 2 Psionic Foci. So, we need Psicrystal Containment.
So, with this set up, we have Azurin + Midnight Augumentation + Link Power + Metapower: Link Power + Psicrystal Affinity + Psicrystal Containment. At ECL 6. After 5 feats (Feat Leech, anyone?). And because you need to refocus both yourself AND Psicrystal, recharge is rather painfully slow. There are ways to speed that up (Psionic Meditation, and Action Economy).
The idea is pretty simple, but execution starts to get a little complicated once you realize, "Oh, I can't do this, and can't do that, and that's not really useful at this level, and how many feats do we got? And..."
-K
