I came across magnesium l-threonate on my own. That version seems to pair fine alongside the glycinate type.
For getting rest I've experimented with plenty of supplements over time. Glycine combined with magnesium glycinate and ZMA formulas gave me good results at first. Yet the benefits seem to fade so I switch them around now and then. Lately I began mixing theanine and ashwagandha together with five milligram melatonin capsules. These turned out inexpensive and useful. I swallow one from each right before sleeping and then get intense dreams that feel like they pound my mind around.