I'm terrible at this game, so take it for what it's worth... I like to keep killing them when I can, because I figure they're going to pile up if I don't. So I would favor some kind of attack instead of a distraction. If you run around on the perimeter, some (but not all) of them will notice you and chase. Lead them away, kill them, and come back for a few more. Yes, it will take all day. I'd be curious to see what the experts recommend.