Mind, you should check my logic with this, since I may be wrong, but I've examined what I could so far of the theory, and it looks sound - and in case you're wondering, Street Magic helped provide this 'technique' in the form of metamagic.
Tools needed:
Initiate of at least 2nd level (with specific metamagics)
ritual spellcasting skill (duh)
ability to counterspell (the more the better).
at least 2 mages (you need at least one per person that is going to reduce their drain. So you can solo ritual cast if a friend serves as the other factor).
all the other neccessities of ritual casting (lodge, etc, etc).
How to lower your drain:
1)The Initiate who is providing the main spell must have shielding, and Absorption (from SM) as their metamagics of choice. The said initiate must also activate their shielding before starting the ritual, so it is on.
2)Shortly before the ritual itself is about to be completed, the assisting mage NOT in the ritual must choose a spell (preferably not dangerous) and cast it at the ritual caster.
3) (important step that needs research to prove it is valid). the Ritual caster deliberately resists the spell, be it harmful or beneficial, and uses their absorption metamagic. Depending on the force of the spell used, the metamagic technique will absorb the force of the spell used, making it a reserve of drain resistance for that mage in particular.
4) before the reserved energy is lost, complete the ritual and use the points to lower the drain code of the spell cast...at least for yourself that is (it's possible the code is lowered for alll other participating mages in the ritual, but I'm not certain).
5) congratulations, you completed the ritual without being quite as tired as usual!
So....any immediate ways to shatter my dreams of having made ritual spellcasting more feasible, or you all going to let a GM do it for me (which, in truth, a GM can do anything to dash anyones dreams, I'm just curious if this is a creative, not entirely tweaked solution to higher power spells).
And before you immediately say it's broken, bear in mind that there are at least two very important factors to using this trick: spare mages to help offset the drain in the first place, and the ability of the ritual casters to resist the spells to absorb them. If you can't absorb, and you're doing a major spell.....ouch. The stronger the spell, the greater the risk of serious injury if you don't absorb properly.