spell slot levels
Short rest revamp - Larian Studios forums
By taking just enough levels in Paladin to unlock the ability, and then focusing on a full spell casting class, you will get more and higher level spell slots.
Resources - bg3.wiki
Warlock spell slots Recharge: short rest (spell levels 1-5) Expended by warlocks to cast any spells they know. Warlock spell slots are all the same level, and any spells casted by expending them are upcast accordingly.
D&D 5e Multiclassing Spell Slot Calculator
Here’s a chart that shows the levels and spell slots unlocked for the Eldritch Knight Fighter class in Baldur’s Gate 3 ...