Granted, you explain a lot of situations in several different ways... It's one of the things I like about these rules.
But, from what I remember, the Alpha's fights seemed to drop into two categories:
In the earlier books, when the pack was bigger and less experienced... A lot of alphas would have a bad guy surrounded. Several of them nip in and out to distract the bad guy, until one of them jumps in to score a hit. For me, that's the sort of tactic you're taking about. The pack stays in the same zone as the bad guy, they pack on maneuvers for aspects like "surrounded", "distracted", "spinning around in circles", etc., and then one alpha tags them all to boost attack or defense and make an attack.
Later, when there's fewer of them, but they're more experienced... You'll see just one or two Alphas (usually Georgia and Will). They keep far out of reach and hide in the shadows or the bushes. When the bad guy isn't looking (usually because he's busy hunting a beaten up Harry), one or both of them darts out, takes a bite, and then runs back off into hiding before the bad guy can really do anything. Maybe there just degrees of the same thing, but to me, that sounds a little more like what Watson is suggesting.