Change I would make:
-2 astral phasing : people usually run this card to counter lure/repulsor on aymara, if you want health oasis is better because it replaces itself and combos well with the illusionist.
-3 cosmic flesh : I don’t think the provoke is really helpful, also you run a lot a buffs already.
-2 Abjudicators : I don’t really see which spell would really benefit from a lower cost, maybe SF but you only have 1.I also don’t like it because it’s hit or miss, sometimes it’s amazing and sometimes it’s useless in your hand…
-1 archon,-1 scientist: they are good cards but by the time they hit the field you’re already winning or losing, and when losing they don’t really help against an established board.
-1 White widow: arcanyst deck.
+1 owlbeast (win condition).
+1 Oasis: combo with illusionist, replaces itself.
+2 Aethermaster: for more consistency.
+2 Siphon : 0 mana mana dispel, only 2 because you also have 2 lightbenders.
+X repulsor beast/decay , you need removal. You could even try sand trap since your goal is mostly to have something stick and then snowball the game in your favor with owl/illusionist.
Never tried mobieus so I can’t tell, he sounds like a winmore card though. Hopefully my suggestions makes sense.