If you'd take Brodz and Manning then I would do this deal. Like you say, depends on where that Jets pick ends up, and if Kreider would say yes to Edmonton.
I would take both back.
From my point of view (not unique, but probably in the minority) the Rangers are waiting on the contracts to Staal, Shattenkirk, Smith, Lundqvist to either be moved beforehand (unlikely for a while or at all) or end naturally in the 2021 off-season anyway, taking on two 1 year contracts at that combined cap hit level is fine by me.
If the Jets pick falls more towards #18-22, maybe the Oilers send back something small, or honestly maybe nothing extra, I'm not letting that hold up the deal for #8.
If it falls later, like 28-31 or something, and I needed to add like a 3rd or a 4th this, or in a future draft, I'm not letting that hold up the deal either.
I have no idea who is on the Rangers draft list, how they rank them or tier them, but I see several opportunities at #8 where they can wait for that prospect to develop over those same two years that it's likely to take to say goodbye to Staal, Smith, Shattenkirk, Lundqvist.
Kreider waiving should the Oilers even be on his list, who knows, maybe he thinks his next contract gets much larger should he end up on the top line wing in Edmonton.