1) Start with a lower weight for the first set.
2) Decrease the increments at which you add weight.
3) Decrease the reps as you increase the weight.
You can't honestly expect to increase in strength after a certain amount of muscular fatigue. Do one or more of the following or simply do flat sets_x_reps. Pyramiding and its reverse are somewhat dumb concepts IMO. There's just something about them that seems so pointless.
If you were to do, however, three progressively heavier warm up sets and a final heavy set, that might be acceptable. For example, if your 5RM is 200 for a given exercise, do 1x5 (100); 1x5 (130); 1x5 (160); 1x5 (190). Of course, I don't know your level of experience, etc., so make sure you have a significant amount of base strength with which to work before doing heavy movements.
Push yourself. Enjoy yourself. Be yourself.
Knowledge is power. Obsessed with functional strength. Journal