It's pretty simple when it comes to sail trim. Sheets
are for adjusting angle of attack, travelers, vangs, barber haulers, and jib
tracks, are for controlling twist.
For the mainsail
, personally I prefer vangs and no traveler for simplicity and automatic twist control at any angle. Most travelers on production cats are not long (wide) enough to offer good twist control for much more than a close reach.
For jibs, it would be a self tacker with a curved track going rail to rail, a Camber Spar, or a Hoyt boom, again for automatic twist control at any angle ( including dead downwind with the Camber spar and Hoyt boom) . Most jib
tracks are only effective for upwind or maybe a close reach, you can cheat a bit by bumping leads forward, but you pretty much need a barber hauler as soon as you crack off from upwind.
Another possibility would be to have an athwart ships tracks on the cabin
top for the jib, to let the lead outboard
just like a main traveler, though it would be limited by the width of the cabin
top it would still offer a lot more twist control than normal fore and aft tracks.