One of the things that has changed about Duelyst since I left is that the game is much more focused on low mana plays- so while the list posted should theoretically work using older meta, I think part of the issue you’re going to encounter is most is simply not doing enough on early turns.
Pax hasn’t aged so well. I’ve seen a pretty alarming of top decks outright cutting the cat unless the plan is specifically Dervish oriented. It’s still a fine 2 drop, but consider your other options imagining a meta where everything over a three-drop has a higher opportunity cost.
Blood of Air is a pretty nasty loss for any Vet deck, in my recent experience, 2 BoA and 2 Bone Swarm (a card which has drastically different playability now,) are where I look to begin a disruption package.
Repulsor Beast is a cool tech choice. but at that juncture you really want to be deep on Ankh, I think 3 is a bit much, and would consider something like Bloodtear, Sojourner, or Spelljammer here. Similarly, Blistering Skorn is still a decent card, but much less impactful than it used to be. I prefer Dancing Blades, because it doesn’t damage my artifacts, but if it works for you, sweet. I might also suggest Grincher here, so that you can play fewer artifacts and still support Tears.
Aymara Healer is in a similar boat as Pax, the disruption of the game has changed quite a bit- and while Aymara can be a sweet linchpin, being a 6 drop makes it a rough draw early on.
The main issue I have with the artifact package is that it’s mostly a smattering of everything- where the artifacts you play should really inform spell and minion choices, It’s sortof a “pick a lane” situation, where I think Ankhs are a gameplan all their own (but I’d really want to be playing Gifts with Ankhs.) Hexblade is still consistently one of the best artifacts in the game imo, but it really wants to compliment a deck that can utilize the burst or debuff portion of the card. Spinecleaver is, once again- a card that I feel wants to be a strategy all it’s own, with an emphasis on making the pings add up quickly. I think Sickle and Spinecleaver compliment each other pretty well, since they occupy different ends of the curve and focus on positioning and attrition.
If you can focus a little more on early disruption and defining a clearer gameplan, I think your deck would would smooth out well. When you get access to them, Blood of Air, Autrach’s Gifts, Grandmaster Nosh-Rak, Wind Striker, Zephyr, and Divine Spark really change how you can build and focus Sajj decks. Consider Superior Mirage or Star’s Fury as well, since they can often only only counter, but outright steal games