Great reel. You don't need a fancy one, or a 2 speed. Senators are bullet proof and very popular for halibut. 5 1/2 or 6 foot rod, personal preference. Either will work great. When we lived in Kodiak, we never used a leader, just tied a big ball bearing snap swivel right to the Spectra. The 'but don't care.
Yes, you need a license.
The shooting of big halibut....I personally don't know anyone who shot their fish, but I've heard that some folks do. Totally unnecessary, IMHO. Just give 'em a good rap between the eyes and cut the gills to bleed them out. We always put them on a rope stringer and let them hang off the side to bleed out, bringing them aboard only when we were moving or heading home. I made up a harpoon, which is handy on bigger fish, but really a good rap and a stringer works great for us. They'll thrash around a bit once in a while, but they aren't going anywhere but the freezer. :lol:
I'd never keep anything over about a hundred pounds again...that size, they're all females and breeding stock. Kept a 200 pounder once...never again...too hard to maneuver when filleting it. I think the perfect size to keep is anything between 30 and 60 pounds.
Never fished the area you're asking about, but generally what I described here and in that other thread will work for hali's anywhere. We never fished deeper than 120 feet, but some places you have to fish deeper. It isn't rocket science. If they're down there, they'll eat your bait.
Rick