I think you've answered the question by mentioning the boat size and Tuna.
There will probably be no chair involved, meaning standing up while attempting to boat very aggressive and possibly large fish.
So that for me would mean standup gear, meaning a shorter rod designed for that purpose.
As for the reel, the one you've been using would work as would others of a similar size.
Since you have already been there, id think you know whats needed.
I've done 30+ years of panga [small boat] fishing........it's far different from a fighting chair situation.
The TLDs are a good reel.....designed by Fred Archer IIRC.
I have /had quite a bunch of salt water reels and only one is a 2 speed.....got rid of the other 2 speed reels.
I've seen too many screw-ups with gear shifting etc.
A better, longer crank handle is far preferable for me....amazing the difference a little longer throw and better grip
can make. Many Shimano reels will accept the crank of the next larger reel in that category or I've Reel Colors
make a crank for my larger reels.
