I run 80# flouro for smaller sniper style jigs. I realize flouro is not needed but I like the extra abrasion resistance. For vertical jigs in the 200 - 300 grams range I run mono either 120 or 150#. Presumably you are targeting small to med size BFT ?
You can go for anything you like, but it is difficult to tell ahead of time what size fish the Captain is going to put you on...
Last week on my Intrepid 3-Day the "bigs" were hanging around day and night. The first morning my friend Trevor hooked up a big daytime jig fish fishing a Shimano Shimmer Fall jig with 60# fluoro, lost nearly 500 yards of line on the first run at 22# of drag. Didn't end well/chew off. I landed a 160# fish later that morning using 80# fluoro and a sinker rig. Another guy hooked 4 daytime jig fish the last day but couldn't get any of them in, fishing a longer jig stick with insufficient lift and recoil. 4 long fights never got any of them to even deep color.
I would bring some 200# fluoro leader with you. Use about 24" as a bite leader IF the Captain says the bigs are around, or if you start to see others getting abused by big fish. And, have a stout rig ready that can put some wood to one of these big fish if you get picked up. You can land a Big on 65# braid if your rig and your leader are capable.
Last couple weeks of fishing I’ve been lucky to get bites on 100LB fluoro wind on straight tied to a 200g jig. Fish ranged from 80 to 180 lbs. Seems not diminish odds of getting bites. Fishing at the right depth seems to be the most important.