I am blessed with bad genetics for the deadlift, short legs and arms compared to my torso. The best variation of the deadlift for me is the Sumo. I have tried many exercises and different protocols but came to a point where I don't see any progressions anymore. I have a hard time activating the glutes and it seems to me that muscle firing is out of sequence as I often feel the stress on my lower back with many exercises.
What would you recommend to activate the glutes and re-learn how to properly fire the muscles in the right sequence? Are there any exercises or training protocols that could achieve that? I am looking at improving strength and add mass to the hamstrings and glutes.