I ran them over, but exmarks aren't designed to mulch, they cut the grass, then pass it from one blade to the next and send it sailing. I've tried various blades and they all do about the same, although the gator blades do a bit better with leaves than most, I just run the high lift ones anymore.I just mulch them along with any sticks an inch or less.
We did pick up the sticks all the big sticks, I don't do that to my blades, I sharpen them enough as it is .