Here's some figures I was working on.
Facts:
• A mage can absorb 10 P.P.E. from a Ley Line per melee, that equates to 40 P.P.E. per minute (per Rifts: Ultimate Edition).
• A mage can hold an amount of P.P.E. above his max equal to 3 times his max, and keep it for one minute per P.E. point (per Rifts: Book of Magic). (I'm calling this "overcharging")
• For my mage, this means he can overcharge with an additional 540 P.P.E. (above his max of 180), it will only take him 13.5 minutes to get up to that amount, and he can hold that energy for over 20 minutes (but that last fact isn't necessary for these examples, as you'll see below).
Here's where it all gets crazy.
The Talismen spell costs 500 P.P.E.. This means, when Ley Line energy is available (as it was in the last game), my mage can overcharge with P.P.E. and churn out FOUR Talismen per hour. Now consider Talismen that store P.P.E. - forget the initial charge of 50, because once that's used they can only be recharged to 30 P.P.E. at the cost of 60 P.P.E.. When my mage overcharges with P.P.E. as discussed above, he can recharge NINE of these Talismen using that energy, and from start to finish the process of recharging ALL NINE will take less than half an hour (20.5 minutes, assuming non-stop casting with no interruptions, which I'm not).
But wait, there's more...
Energy Sphere costs 120 P.P.E. to cast, and at level 4 my mage can fill it with up to 400 P.P.E. - Overcharge, cast and fill and there's a 400 P.P.E. Energy Sphere available in less than 15 minutes. Overcharge to 540 P.P.E. again, and with the Energy Sphere available that makes 940 P.P.E. available, and it only takes about a half hour from start to finish to accomplish! When making scrolls using the Create Scroll spell (which costs 100 P.P.E. before adding in the cost of the stored spell), that will result in my mage "only" having 840 P.P.E. to use when casting the spell to be stored. Add in a few P.P.E. talismen (six, specifically), each with 30 P.P.E., and my mage can make a Scroll of Dimensional Portal in less than one hour!
With the Sustain spell active, this can continue for 22 hours out of every 24. And none of that process will use up any P.P.E. from his personal reserves.
I understand the dangers of Psi Stalkers and other beings drawn to high PPE usage, but barring that does this really all work out right?