I have been tweaking an artifact deck for a while now. Tried a mid-range version and a control variant but non of those seem to work. Turns out the best way to play with artifact finisher is to go all out face.
Basically, the goal of the deck is to chip the opponent’s HP while trying to pick up the combo pieces for a finisher. The most out of hand damage you can do at 9 mana is 2x Tear + 2x Staff + Time Maelstrom for 28 damage. The max damage output for a single turn however is variable as you can get better discounted artifacts from Grincher allowing you to play a tear to boost your damage further. There are also situations where you can setup lethal by equipping artifacts a turn before the combo tear + time mael.
Mini Combos exists too. At 5 mana you can go for Falcius + Warlock dealing 7 face damage without taking any in return while setting up the board too.