Yeah, flurry is also somewhat helpful for tiering up, but obviously only when taking on multiple creatures. And even then, it's a little tricky because you have to pay attention to what subsequent attacks you need to in order to tier up against the other creatures that you jabbed. Still, all those extra jabs are pretty hand when you're taking on a room full of creatures, especially with flares/ensorcell.
I keep meaning to actually test it out, but I think flurry may be a little broken when it comes to mstrikes in that it can interrupt the auto tier-up thing that you get mstriking. I'm fairly sure that if a flurry jab hits in between mstrike hits, you end up jabbing when you should have otherwise punched or whatever and it interrupts the tier-up. Don't quote me on that, though. I'll try to go through some logs today and see if I'm actually right about that.