If your running an HP30 axle, the only way your going to "clean" a few teeth off of the axle is to seriously beat on it, or from running huge tires.
The biggest issue with Ring and Pinion teeth being chewed off is from people flat running too low of a gear ratio. Why somebody needs 4.56 gears in a D30 is beyond me, unless your tires are too big, or you are rock crawling... Neither the Dana 30 or TTB 35 is meant for that and is going to serve you little purpose.
My friend has an XJ with 31" MTR's and 3.55's, we put a locker in the front, and we give it hell, it takes on obstacles that trucks twice its size fight. It has yet to break a ring and pinion or a shaft, and has plenty of low speed to do anything aside from rock crawl.
I hear of more people breaking D35 hubs, outers, and beams than I do of jeep guys breaking ring and pinions. Besides The ring and pinion is only a little over 5/16"s bigger on the D35, its not like its huge compared to the D30.