i use nail knots to connect my fly line to a butt section of 30# mono, which i then blood knot to my leaders. You could also put a perfection loop on the end of your butt section and loop to loop connect your leaders.
At the end of my leader i will connect some tippet material, again with a blood knot, or double surgeons knot.
from your reel it should go
backing
fly line
butt section
leader
tippet
fly
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