While not enough time/access to work on my car i deep dive into theory to try to understand, been looking at camshafts and have a decent idea of the timing events and spec and what they do. dynamic vs static compression, overlap etc im still completely lost when it comes to power band. Ive been looking at Oregon cams and they dont provide that spec. so comparing other brands advertised information it seems to come down to witchcraft. comparing similar cams with 108° lsa, advertised lift less than .017", but powerbands jump around. looking at the isky 505 3.5-7k has 2°less advertised duration than y-292-s (2.8-6.5k) but 14° more duration at .050. add the y-302-i 3-6.8k with 1° less than the isky. That looks like isky quicker ramp rate gives more area under the curve so that dictates the powerband. But y-284-s has 14° less duration, with a higher broader powerband than isky 301300. I assume there's too many variables. Is it witchcraft until tested with a specific application? when comparing cams does a slower ramp rate help driveability while still giving some idle chop. 
Seth