Morkus from Orkus
You don't even have to look at Monks for spell points to be a perfect fit for 5e rules that already exist. Just look in the DMG at the character options.Ki basically are spell points though. They just also use their spell points for other non-/quasi-magical abilities. One of the reasons why the 4E Monk sucks is because of how its Ki points conflict with other class features and with the action economy. But it still basically operates as a 1/3 caster with spell points that recharge on a short rest (e.g., see Warlock).