You will not find commercially a 3:1 (or close to it), single bevel, 150 - 200 gr., Rockwell Hardness (RH-54), here’s the kicker…screw-in. The limiting factor here is the weight you seek.
You can satisfy most of what you want with the A&H Abowyer Brown Bear. Bjorn on this site, will endorse these heads...talk to him. I have shot a few deer with Brown Bears with good outcomes (dead deer but anemic blood trails). The Screw-in Brown Bears are 265 gr. or thereabouts. I use them and a few other 3:1 ratio heads. If you'd like to PM me for more info, I’d be happy to comment.
Your best bet would be a Kodiak (formally Grizzly) of “fill in blank” weight used with a 50 gr. steel broadhead adaptor. That combo could get you under 200 grains but I would be more open minded and use what shoots the best. More weight up front is desirable (EFoC) provided all other characteristics are met.
I too, have been heavily influenced by Ashby’s writings but am rethinking that data for deer sized game, based on my own experience and the experience of those close to me.
Lots of possibilities. What you think you want, will likely not be what you end up with. For deer, consider the 3 blade VPA’s (I know what Ashby says about 3 blades, but forget that Re: deer) This has been an ongoing interest of mine for 30 years. Lots of oipinions Re: this subject.
Have fun -
Kris