You have to kind of play around with it to see what works, I think. I stopped trying to figure out how many activity points I was actually earning, and started just giving myself 4 points every time I worked out. It seemed to work out to one point per 100 calories burned, and with my workouts I definitely burn at least 400 calories every time. I run, I do high-intensity cardio, etc., so I burn lots of calories. I'm probably technically earning more points than 4, but I just picked 4 as the limit. It's working for me so far. I get 24 points, but I eat 28 on most days because I almost always work out. I figured out that this range allows me to consistently lose weight. You may want to assign an activity point value to your regular workouts and just eat those points and forget the perceived level of exertion and all that. It's easier. If your weight loss stalls, then you can reevaluate.
Start by doing what's necessary; then do what's possible; and suddenly you are doing the impossible. -- St. Francis of Assisi