I've got an older abu garcia ambassadeur 5000c, and right now am using a 20# Trilene XT. The line seems too thick for this reel. I feel like I could get a lot better casting with a thinner line. Could I use braid and if so what strength? Would fireline be ok? I want to use it for musky and what size rod should it be on? I have it now on a 7' Guide series medium heavy that I used for trolling with my line counter reel. Thanks in advance for any info.