We normally do cattle - sheep - ponies, each grazing closer than the last and nullifying the worms of the previous occupants. But I have to say that in this current long dry spell, the grass is struggling to come back from the ponies if we leave them on to eat it as short as we would usually. Still working on how to do it, but I'm kind of having one sacrificial area that the ponies come back to (and I'll feed them hay if I need to, rather than let them graze another area too short), interspersed with letting the ponies in with the cattle for a day or two now and again.
Christine Page (Pasture for Life) says of her cattle she lets them 'eat a third, trample a third, leave a third' before she moves them on. I like that.