Regardless if it’s tacky to link to myself, I go into some depth about the more “advanced” concepts of scanning, and link to a very good video that gets you through the basics succintly.
How to take scanning to next level on day 1
I don’t yet see the value of Sisters, because I have been able to scan everything I’ve found in low-sec and WH-space with just Probe 1s.
And I think I scan fairly quickly. Anything below Level III I typically get in 2-3 ping sweeps.
Getting Level III or higher has sometimes been challenging, but I’d estimate 4-6 ping sweeps.
Ping sweeps = scans…just my phrasing.