The double pause method calls for a weight you can do 4-6 times. The mTor sets call for 6-8 reps on the final set. The 6-8-10 set is pretty self explanatory. 6 rep max, drop weight, 8 reps, drop weight, 10 reps.
The common number is 6. If you can do more than 6 reps on your working set then it's probably a safe time to add weight. The goal of this program is hypertrophy so waiting til you surpass 8 or even 10 reps would probably work OK.
If you've done any mTor sets then you'll know that 6 reps is good! I don't want to do 10. It hurts so good.
As far as deloading that's an independent variable. I've only needed to deload when doing a very intense progression like the Complete Power Look program--after week 10 I'm smoked. I'm not sure if I'll have a need to deload on this program since the daily volume is lower than I'm used to doing. Read some articles about deloading and learn to read your own body. We're all a bit different.