What spell slot count formula can I use to base my homebrew

The calculator does not calculate slots correctly when only multiclassing with warlock The warlock class uses Pact Magic rather than being

CR Calculator · Encounter Generator To cast one of your artificer spells of 1st level or higher, you must expend a slot of the spell's level or higher

spell slot calculator You can choose which AC calculation Even the Wizard might find Eldritch Cannon a better use of a 1st-level spell slot than most spells

spell slot tracker spell slots, cantrips known, and spell slot level You should consider aligning your Otherworldly Patron feature between both classes, but your DM might