[WoW] Instancing with 4 Boxing?

So I've been thinking about getting 2 more accounts so that I'll have a total of 4. The thing is, I want to be able to level them as fast as possible so I was thinking of instancing. I was thinking of trying 3 locks and a priest, and have the locks use VW tanks. Any ideas if this would work as good as I think it would? If not, what would you suggest? I don't think 4 priests would last very long in an instance, which was one of my other choices.

If you want to instance, you really want to be going in with 5 toons. If you really want to do a 4 box, you'll probably be looking at bringing one other whenever you run something. In the worst case scenario, it'll be a random person on your server. (a pug) In the best case, it'll be a friend or guildmate. Either way, you'll want to try to build a team that can work together with a random element.