Thank you, I'd far prefer negatives when I can't physically lift the weight in its entirety anymore
For me, my set progression is thus: for exercises that can be safely rest paused, they're rest paused DC style. After the third mini set, whatever you'd like to call it, I wait a few more seconds and bang out a final full rep. From then on, it's forced reps first; I train by myself, so this typically means one limb at a time, giving assistance on each rep as little as possible. It's not hard, complete a rep as far as you possibly can, then give yourself a little 'tap' to get yourself through the entire range. Control your negative. When positives are no longer possible, you're moving into partials, then negatives.
When you literally can't move the weight anymore, you're good to stretch, shake out the lactic acid and go to the next exercise