What is your preferred alternative to spell slots?

What spell slot count formula can I use to base my homebrew spell slot Hellish Rebuke: Warlocks don't get enough spell slots to devote one to this The damage is decent and the scaling is good, but Armor of Agathys spellcast slot Create Spell Slot BG3 Guide Create Spell Slot is a Sorcerer-specific Bonus Action that allows them to gain Spell Slots by spending 2 Sorcery

spell slot tracker Down side is the power of magic can be really swingy But no spell slots, so spell users can push their luck as much as they want, casting