Replying to How Wide Should I Go? (For a Smaller Person)

Looking for a powder ski. This ski will be used mainly in Tahoe but also other places out West
I'm 5 foot 8 and barely 140 lbs. (I have tried it all please no recommendations)
I have struggled to put on weight my whole life and have never weighed more than 155 lbs.

The skis I am considering currently:
Moment Deathwish 184
Moment Wildcat 108/116 184
ON3P Jeffrey 108 181
Atomc Bent Chetler 120 184

Before Covid, I skied in Whistler and Squaw Valley with some deep powder days. (~3-5 feet). I felt like my Kartel 96s kept me afloat plenty on any day below 3 and a half feet. When it snowed more, I tried Atomic Bent Chelter 100s and I felt like that was enough floatability.

I understand since I am a lighter and smaller person that staying above the snow may be easier, but I feel as if there is a point where going wider is providing diminishing returns on floatability for me.

What width has worked better for people around my size out west? Am I completely wrong and need to send something wider?