When I have a character with it, I almost won't wear non-armor gear (e.g. clothing) or other stuff that has zero AC value, and that's about as much effort I put into specifically gearing for it.

I could get a little more DR out of it if I really cranked out the AC, but, to me, doing the above is a good balance point between getting good value out of the legacy without paying too much elsewhere in your gearing strategy for it. I don't think it serves you to get 5% more DR as a warrior if you have to give up 30 dam and 5 STR or whatever to get it.