Eman Slayer Setup with 500M Budget?

[Twurple]

I want to kill T4 Voidgloom to get to Eman 7, I'm currently at Eman 4. I struggle with even T3. I have 3/4 necron + Warden helmet, an OFA GS and Hyperion, an overflux, and Leg Lion pet. I also have full final destination armor and a mythic enderman. With a budget of 500M, how can I consistently slay T4 Voidgloom?
https://sky.shiiyu.moe/stats/Twurple/Banana

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