Wow. I really miss Okinawa. What a great place. Can't believe there are tuna in the area. Would think it would be scowered. Maybe they are just eating everybody elses tuna.

Seriously, I think you got it right the first time. I do my big reels pretty much like you describe. I use Jerry Brown and feel like it's superior but that's not critical.
I would definitely leave the 200 feet of mono on there as a topshot. It allows a bit of a shock absorber which helps to minimize pulling hooks.
I really like the high vis line for the braid. Probably just my old eyes but it sure makes it easier to see my lines. People who don't like it think it's off putting for the fish but heck you're trolling with the mono in the water, not the braid.
If I only had one reel, I'd load it with Jerry Brown Indicator line so that I could also use it for some deep dropping. I just got some of that stuff and it's really cool. It's less hassle than a line counter and more accurate in my opinion.
Good luck.
Did I mention I'd love to go back to Okinawa. Hong Kong is fun but not Okinawa !
Cheers from Mexico !
Richard