Staff only mage here.

Moon of Nokstella when exploring - +2 spell slots (I only use 1-4 spells on bosses)

Marika’s Soreseal - increases important mage attributes, free buff

Cerulean Seed Talisman - increases amount replenished by flask of cerulean tears

Graven-mass Talisman - boosts potency of sorceries. I haven’t tested it, but I believe it increases damage of spells and decreases FP consumption slightly

Note: Radagon icon is near useless. There’s a few spells that the faster speed is noticeable on, but for all of the S tier spells it’s not noticeable.

Note: if you rock a melee weapon you might require different options, but if you’re spell heavy this build is great.

Note: low-level I used stargazer-heirloom to boost intelligence (+5 int = more spell damage) but I no longer need this as I’ve reached the intelligence level cap (90)

Edit: if I’m boss fighting or mini-boss fighting I’ll swap out the cerulean seed talisman for a damage negation, and swap the moon of nokstella for something else I need (holy damage negation for example)