A quick video I made which may be helpful to people starting out with kingfish jigging. This is how I set up my jigging gear

Once you get some good split ring pliers they literally take seconds to change jigs with. Anything else is either too bulky or too weak for the job. I won't be changing any time soon :)

As for rod/reel.... the rods are pretty specialist, you want something in the 5' to 5'6 range for overhead, it needs to be relatively stiff right the way through and fairly parabolic. How stiff exactly depends on the size of jigs you're planning to use; most rods will jig maybe a 100g range well-ish and then another 50g either side somewhat well (water depth plays a huge part as well by damping the action of the jig) so a 200-300g rod will probably jig 150-350g without too much trouble and be ideal with a 250g.

Reels need to be compact and narrow. Narrow is vital with mechanical jigging to get good line lay; you can't do it manually because the jigging action is a bit too fast. You need plenty of drag, probably 12kg minimum, and retrieve rate close to 1m/crank although you can alter your jigging action to match the reel. A longer arm and larger handle than your average reel is nice too, as is an instant anti-reverse bearing.

My 2c only but that JBraid X8 "80lb" breaks at like 105lb or something; the little Catch reel doesn't make anywhere near enough drag to make use of that, personally I would spool a setup like that with the "50lb" which breaks somewhere in the 70's off the top of my head. Straight braid Steps - these little reels don't hold a whole lot when it's this kind of line weight and if you want to jig deeper water you need all of it. My inshore jig setup takes 200m of 50lb JBraid X8 and my serious business setup takes 400m of the 80lb.

I was using quite a lot of the 30lb but as I replace braid I'm changing to the 20lb. All of the JBraid breaks way over the rating (which reflects its relatively large diameter) and what we get sold as 30lb is actually more like 50 and vastly excessive for the average "10-15kg" setup. The "20" is still over 30lb actual breaking strain and way thinner, gives way better "feel" and lets me use lighter sinkers, all round better fishing experience. I use 30lb mono leaders a lot with these setups and I'm yet to have the braid go pop, it's always the leader.

Even at mid-30lb actual breaking strength it's probably excessive for setups where the functional maximum drag is likely in the 5-6kg range; I could almost certainly get away with their "15lb" braid but I like a little extra abrasion resistance if a Kahawai goes under the boat.... plus that light braid is super slicey on the hands.