Negotiating sale economics with CEO?

Hey all--I’m a VP in finance at a PE-backed company with a few hundred million in revenue, running a sale process for a deal in the low single-digit billions. I’ve been here 2-3 years, promoted from director. The process has been a cluster: our CFO was recently fired (the CAO was promoted to CFO), the finance team is stretched thin, and I’m having to work on my day job while leading the CIM prep, market study, model, and day-to-day coordination with the bankers. I'm one of the ~3 people who can truly do this work (along with the new CFO and an analyst), so I think I have some leverage.

My cash comp is in the mid-$300ks, but my equity looks like it’ll pay out only around $100k in the sale (mix of low total equity but also unfavorable vesting/acceleration dynamics). I’m uncertain I’ll stay long after the deal, so this may be my only meaningful liquidity event from my time here.

I’m considering asking for additional economics tied to this sale and would appreciate a reality check from people who’ve seen this firsthand. What would you ask for, and what would you realistically expect to get? Would you structure it as a transaction bonus, a retention bonus, additional equity that accelerates at closing, some combo of the three?

I’m also trying to figure out how to raise it with the CEO. He’s told me he really wants me to stay and essentially offered me any role at the company if I stayed following this deal, but I don’t think he realizes how little I’ll make from the sale. How do I make the case directly without sounding like I’m threatening to leave? I've gone pretty deep in a few processes the past three months and could credibly say I have other opportunities, but I don't want to lead with that.

Appreciate everyone's thoughts on this!