Concept: Lightning Based Eldritch Knight build for Aeon. Paladin 2, Sorcerer 4, Dragon Disciple 4, Eldritch Knight 10. Total casting levels = 16 sorcerer. Use the electric bracers from act 3 dungeon to convert everything to electricity with also taking the mythic element: electricity to nully all electric resistance to my spells while getting bonus damage per spell level with draconic origins.

Heavy armor user (sub-optimal I know) to max out Str, Con, Cha instead of Dex/Wis like most. Mythic Heavy Armor focus would significantly scale the AC as well. High critical threat range weapon (scimitar most likely but falchion possible) would be weapon of choice. Tank/caster support until mid-end game where becomes spellcaster controller with higher level sorcerer spells and access to special rings.

Half considered using cha magus instead, but spell progression would stop with level 6 spells at best instead of level 8. This would then turn the character into more of a striker than spell caster with using spell strike to deliver touch spells with higher threat range. Would heavily optimize for touch spells and melee damage. Then boils down to one handed or two-handed weapon.

What could be improved for making it effective/core viable?

FYI, going for Sadistic Game Design achievement so would have to be without add on/mods.