Putting aside all the other issues we're all discussing about thaumaturgy in another thread, my table and I are trying to figure out if and how two wizards' Lore scores should interact when starting up the ritual, i.e., how many shifts the characters start from when building up complexity.
So far, we've discussed three options:
A. Only one wizard's Lore score matters; other wizards can only contribute to the complexity through declarations, invokations, etc.
B. Combine the Lore scores directly, so if you're doing a Divination ritual with one wizard specializing so his Lore's effectively 6, and the other has a Lore of 4, you can do a 10-shift ritual immediately.
C. Pick one wizard as the "lead" in the ritual, use their full lore skill, and take half the Lore score of the assisting wizard, so the example in B. would let the pair cast an 8-shift ritual right off the bat.
What do you guys think?