You'll have enough to make several of each Sage piece. They only cost 2 mats each after all (each from a different act.)
I don't mean to imply that rifting is a bad way to level, because it's not. Rather, it's inconsistent (you might get a rift full of hard monsters like Lacuni or Anarchs) that also has poor density, or you might walk into a zombie rfit and start wrecking face. But to me, Rifts can also be pretty dull (all rifts have the same general objective.) I prefer the variety in bounties personally.
Another big difference is that you can't get killstreaks in rifts. You can in bounties, particularly dense areas like Halls of Agony and cursed chest events.