The final gear ratio of a reel can make a big difference in how it feels when pulling in a big fish. A reel with a fast retrieve ratio will make for a fast retrieve under light load, but lacks the power to pull in a big fish as compared to a slower retrieve ratio, that gives a slower, but easier time on the reels handle. Type of reel also matters, with a bait caster type working better on big fish than an open faced spinning reel.
Electric reels are also an option, though I have never tried one except a commercial version on a tuna boat that would not be practical for normal use.
Some folks reel in using their wrist, turning in a circular pattern. You get better leverage and less wrist fatigue by keeping your wrist straight, and using your arm moving in a circular pattern to operate the reels handle. Keeping the rod in a rod holder while reeling helps, as does a larger torpedo grip on the end of the handle.
Halibut fight out of proportion to their size because of their flat shape, and desire to always stay on the bottom when hooked.
Larry