There are so few battles in DIII that I prefer to jump on my pulldown targets immediately. Here's my general strategy:
Before recruiting starts I identify maybe 30 or so potential targets based on my team needs for that recruiting class. During the first cycle of recruiting, I send each recruit one phone call and call their coach once. This will allow you to pare down your list to identify only the players who will talk to you. Then the players I want the most I will use a couple SVs on, and after that will immediately jump on my favorite 2 or 3 guys to get them considering me.
To get a DII guy to consider you, you can often do it with 10 SVs and a scholarship offer. If 10 SV aren't enough, keep using groups of 2 or 3 SVs until they consider you. Once you're on their considering list, you don't have to recruit them anymore unless another school shows up on the list.