Might it be possible to have an upgrade set for this item? Sorta a mirror to the Sorcerian Ring, pair it with the Ring of Holiness and the holy symbol you automatically get. The pair by itself skips 5th level priest spells however.
Could have a varying set of abilities depending on which holy symbol too at least.
Empowered Talassan Holy Symbol: Holy Symbol of Talos, Ring of Holiness, 2 scroll of protection Lightning (green), 2 scroll of protection Fire (green), 2 scroll of protection Cold (green), 2 scroll of protection normal missiles (wizard), + coin cost of 15000. Results in +1 spell for each level, +5% magic resistance, and a once/day Storm Shield.
Empowered Mourninglord Holy Symbol: Holy Symbol of Lathander, Ring of Holiness, 2 scrolls of protection from undead, 2 protection from evil scrolls, 2 scrolls of haste + coin cost of 15000. Result, +1 spell for each level, +5% mr, and once/day Boon of Lathandar.
Empowered Watchers Holy Symbol: Holy Symbol of Helm, Ring of Holiness, 2 scrolls of phantom blade, 2 scrolls of haste, 2 scrolls of mordenkainen's sword, 2 scrolls of enchanted weapon + coin cost of 15000. Result, +1 spell for each level, +5% MR, 1/day Seeking Sword.
Just thought at least
.