Aww c'mon you've got to change the title to : Unearthed Arcana: Artifinally 4 - Electric Battleloo
Cantrip use goes Tomelock level 3+ >> Lore Bard level 6+ >> Arty#4 , until level 10 then Arty#4 is the best cantrip-er.
Love that ability.
It's something like half of your combat rounds, and massively useful out-of-combat.