I routinely brew the BCB Rye IPA and the SWMBO Belgian Blonde in the recipes section, and I use no rice hulls whatever. The former uses 2 pounds of rye malt (reputed to be a mash-sticker, like wheat) with over 12 pounds of other malt, and the latter uses four pound of wheat malt with just 5 pounds of 2-row. Nary a problem with the sparge. (I use a standard Bargain Fittings braid-type sparging manifold in a 10 gal. cylindrical Rubbermaid cooler).