I have had great luck using #6 P-Line CX, breaks like 8-10, often will straighten hooks. Will have to try fire line.

Running 15# braid on one UL/Light reel, not perfect, strength is it's strong point, but for UL and light action, I may run only flouro lines in the future. Always cast a country mile, very limp so last a long time and no issues casting, etc. - and stronger than similar mono.