I am in agreement just extrapolating the cost per unit to suffused energy.
The price difference is at least somewhat correlated with the number of applications a given profession needs to provide on a given piece to max it out. The value of each ensorcell is far higher than the value of each WPS service because the requirements to max ensorcell are finite, and the WPS is not. Thus the cost for 1 suffused energy is far higher. Wizards land in the middle. I would guess clerics and monks would land somewhere in the middle. Cleric energy value is probably actually pretty similar to sorcerer's based solely on number of uses required to max out a given item. That's how I see it, though just because that makes sense doesn't mean SIMU will follow that logic...
I don't use Lich. If you want to do business with me, contact me via PM, IG, or on AIM. Or maybe use smoke signals. Don't like it, get off of my lawn.