What are your thoughts on Ritual casting and the cost to the party at large? Do you withold a 10% value of treasure parcels? Grant an extra parcel of ritual components? Not charge PC's for some rituals?
As the party's Wizard, I did most of the ritual casting.
First, all arcane based rituals were given to me without costing me share of treasure. The Cleric got the religion, nature and healing based rituals. When the Cleric died, the Warlord got the healing based rituals and I got the rest. Four group members usually participated in a ritual casting that required a roll.
Second, I convinced the group to spend the cost of ritual casting out of group funds, unless they were for personal use. Some were for the personal use of myself or other characters, and the beneficiary paid the entire cost. I made no profit from ritual casting from party members.
Lastly, we made no rules changes. But as a group we favored five changes:
1) That the stated cost for ritual casting be in silver rather than gold.
2) That the Enchant Item ritual take a full day per item level to cast.
3) Replace the Brew Potion ritual with a healing ritual that granted a healing surge.
4) That wizard utility spells be castable as rituals.
5) That the time to cast rituals be reduced somehow.