The cone of all of those weapons is identical. They all use Shot targeting cone for their range (though asteron striker normal and hard use rifle range, the special is shot range and targeting). A good Hell Laser or Raygun is useful to have too, as you don't always want autotargeting. Then there are other things like Kiss of Death (slicer, same stats as s-rank j-cutter hell), Ultima Reaper (partisan extended range and 15 target), and Outlaw Star (launcher, can spawnkill). They all have their uses depending on the situation. For example, in seabed you don't really want autotarget so much, so a hell laser is useful, and many spawns there are quite good to use Outlaw Star launcher type on. Ep 4 you have lizards which can't be hit by ranged attacks from the front, so Ultima Reaper is extremely useful, and for eclairs you generally want to target them with a quick pinpoint weapon like a laser, or potentially a yas7k depending on positioning but it can be more difficult. Seaside will be where autotarget is great and asteron striker / yas7k will shine a lot, with many gee popping down in spread out locations. Against something like monests and mothmants, a shot or slicer will work good especially when there is more than one, but a regular laser to snipe down the nest itself quickly is great too. It depends a lot on the situation.
Baranz launcher actually has some atp for %s to work on, but vulcans have almost none. % other than hit will do basically nothing for vulcans, as it will only add on that % of the WeaponATP extra. High atp weapons will scale much more with %, and even then charge weapons are usually going to shine when you have high shifta to give yourself enough atp anyway, so for the most part it's better to use on other things that give you a bit of a boost when you don't have shifta (e.g. high atp mechs like psycho raven, dual birds, mille faucille, rage de glace, etc.).