Don't get confused about your tippet size and the weight of your rod. The 2 don't have much to do with each other in my opinion. Your leader/tippet size should correspond to the size and weight of the flies you are fishing and the conditions you are facing. Light tippets help in low water with skittish fish and fish that are heavily pressured. As already mentioned, you'll need a heavier leader to make that heavy old woolly bugger turn over and cast right. I do think the buggers are a good choice though. If I could only have one fly for the rest of my life it would probably be a woolly bugger.