You would run into complications trying to use the usual aminorex analogue route for that, wouldn’t you.It's true that fencamfamine is slightly better than camfentamine but I didn't note a huge difference. It's the fact that both have mild opiate activity (as cypenamine does) so they are much less stimulating.
Of course, it's been decades since I've taken a stimulant. I struggle with anxiety and the last thing I need is an increase in stimulation.
The last entactogen I took was MDAR which is notably better than MDMA although it's never been commercially popular because the patent route isn't too friendly and as far as I can tell, modern RC vendors don't do much research into finding better syntheses. Seems dumb. It might cost you $2000 for a qualified medicinal chemist to find and document an improved route... but if it then means you can buy the target compound for $2000/Kg LESS because you provide a cheaper route, it pays for itself very quickly.