TGU progression question

Was just wondering for some input on what the best way to progress through the TGU is for strength purpose.

Heavy Singles , 3-5 sets : 1 left, 1 right, rest for as long as it takes to be able to do next rep (5+ minutes)
Moderate Heavy, 5 sets: 1 left, 1 right, no rest in between
Medium, 10 minutes of non stop, alternating sides.
Medium, 5 left, 5 right
or any other way?