I've had equalizing problems in the past. Learn the Freznel first and learn it well. It is far superior than 'pinch and blow' and easier on your ears.
Get your ears checked and cleaned out. If they are full of wax, don't let the doctor syringe them on the spot. Go home and pour olive oil into them for a few days (cotton balls to keep it in). This loosens the wax and also prevents it from sticking to the eardrum. If you syringe it without loosening it first, the wax can rip away at the eardrum when the water flushes it out.
On my way down, I usually equalize with the freznel with every monofin stroke (so every 3-4 seconds), avoiding any pain or discomfort. On good days I can equalize without pinching my nose down to -35m
I just do Freznel and it works with lower pressure.
In my experience, if you avoid pushing against your ears when they feel stuck, you'll do better in the long run. Warm water in your ears is also good. I usually let some in at the beginning of the dive and let it warm up.
Pete
