For streamers I prefer a straight FC furled leader at 42", this gives better sink profile and power. You can also fish nymphs on this, but I prefer a thread FC combination where the FC is a core transitioning to straight FC tip at 72". The Mic of materials gives you a good combination with suppleness of thread and stiffness from FC, and density. Either of these fish poppers as well and help get the poorer just below the surface to help give the fly more of pop when stripping it. For wets our dries I like a thread lesser with a mono core. This gives a supple leader with just enough stiffness to cut through wind, and longer tippet. I treat my leaders with Otter Butter so they stay floating for the day.

Tight lines