>>2722238I use everything from 4lb to 14lb on my normal setups and my pike leaders are 30 pound wire.
6x is tiny
5x will do everything you need in the #16-#22 range, most of my leaders are no lighter than 6 or 8 pound test and iij only drop down to 4 if I physically cant fit 6lb through the eye of the hook
Generally I use relatively heavy tippett because when I snag I can usually get the fly back.