Squeezing more fun out of a Fighter/Mage/Thief (BGEE-TOB)

So normally I just use Stoneskin, haste, mirror images, traps, and go to town. This playthrough I've been using things like chromatic orb, charm person, wands, etc.
I am wondering if there are any mage spells I can use as a FMT through the trilogy to have more fun?
I am mainly a solo player that uses melee (paladin, fmt, f/t, etc.), but I want to use this FMT as a more spell casting friendly character so I can learn a little bit more about the offensive/utility spell mechanics besides just being a buff bot.
I want to do this because next playthrough is either going to be a sorcerer or a mage/thief, or some epic combination of offensive spellcaster.
I basically want to be better at magic than Irenicus.
I am wondering if there are any mage spells I can use as a FMT through the trilogy to have more fun?
I am mainly a solo player that uses melee (paladin, fmt, f/t, etc.), but I want to use this FMT as a more spell casting friendly character so I can learn a little bit more about the offensive/utility spell mechanics besides just being a buff bot.
I want to do this because next playthrough is either going to be a sorcerer or a mage/thief, or some epic combination of offensive spellcaster.
I basically want to be better at magic than Irenicus.
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The culmination of this experiment was when I dualed an assassin at level 2 into a mage that I then soloed through BG and SoA, by which time it was all becoming too easy.
So, if you're soloing I can really recommend dualing into a mage in order to get extra abilities/flexibility.
I just discovered how great spell sequencers can be.
Still, If anyone could be better than Irenicus - its a Dragon Disciple Sorcerer. He also eats f/m/t for breakfast!
As for BG+SOD, here is my dragon sorc spell selection: