Well you knew most of the stuff, but you just haven't used it yet.
You just posted as I was typing(yeah I like expressing myself with a lot of words; this way it is easier for others to understand my complicated way of thinking(not better, just more complicated
) ).
About the min number of attacks. To get the minimum 3 you need to edit the Maximum number of targets to be 1. If you set it to 0 you get unlimited number of attacks.