You need some more “well-stated” minions like Healing Mystics and Primus Shieldmaster. The body and healing effect is very important, especially when you’re running not too many minions in your deck. Also, including some sort of “pings” like Bloodtear Alchemist and Blistering Skorn would help you through situations, such as playing against Reva’s Heartseekers, Jaxs, and swarm decks.
Oserix looks good on paper, but in reality it’s just a dispel bait. Looking at your deck list, I’d say Oserix doesn’t fit - he is aggressively stated and his Last Wish effect is too slow, so it wouldn’t help much for you to fend off the aggression and pressure that you’d be facing with this deck.
I don’t think Rae is any helpful. The dispel effect could be easily dodged if your opponent positions well and abuse the not-so-clever Battle Pet AI decision making. If you want that much of dispel, run Lightbender instead, as it has a better body, is more likely to hit your desired dispel target, and is very good against Cassyva.
3 Wildfire Ankh is also too much. Equipping multiple Ankhs has no difference than equipping one only, and sometimes Ankh doesn’t help much other than providing you 1 or 2 single target blast hits. One issue that I had with playing Wildfire Ankh: it didn’t help me much during the starting few turns, as 1. most minions are 3-health and 2. you have to walk to the centre of the board to fight for mana tiles, making me
You could use some more card draws. Currently there’s only Scion’s First Wish as an arguable card draw. L’Kian is your best choice of card draw, although you have to replace most of the cards she generates and fish for your artifacts in your deck. Sojourner is okay, but it’s a bit awkward to run her as she costs 3.Since this is an artifact-oriented deck, you can also look into Artifact Hunter and Grincher, but be noted that you could get crappy artifacts out of Grincher, such as Sunstone Bracer, Ghost Azalea and Morin-Khur.
You could make some small tweaks on your removal choices. Entropic Decay is often not helpful, as a decent opponent could play against it by good positioning. Having said that, it’s still good to run like 1 copy of it. Dominate Will is very powerful that you can win a game solely by having it on time in late-game. Repuslor Beast is also a strong inclusion.