This window regulator thing was a challenge . Thought I had it but no. What really made a difference was getting the the correct shim thickness on the outer cat whiskers . The clearance between window and whiskers changes as the widow moves and front to rear ( loose in the front while tight in the rear). Takes a few tries to get it right which requires glass removal. If you take the time you can get it to a point where the weight of the glass has little effect on the regulator operation. Also spent time shimming the regulator to door structure so the door frame would not flex during window operation. A big help is to get someone to operate the window while you watch everything move. The slide has to be shimmed to clear the door and latch link. Again it takes time.
Also, the spade connectors used on this car (9193) are total junk. I have found several loose and or partially broken. If you try and squeeze them for a secure fit they break so I now just replace them with a AMP spade . Makes a difference when the drive motor gets the amps needed to do the job.
Last, you can spend a lot of money on contact cleaners which is a waste. In forty years the absolute best I've found is WD40. Hands down the stuff works so I use it everywhere. It's magic on rheostats, switches and contacts . Works so well that CA. will probably ban it.