CBN will get you that rubber body feeling, it’s easy to manipulate with decarb time.
See 3 hr decarb time: Decarbing at 100 degr. Celsius (212 F) for different lengths of time. my personal findings
I think one strain you might wanna look into is BOG Sourblutooth.
And Violet Kush auto from Gardens of Green puts me to sleep fast.
Could get the Violet Kush photo version and cross with Sourblutooth.
Or perhaps it’s the mix of cannabinoids with the ruderalis that makes it so sleepy, dunno.