The main reason why I go Railguns over Light Needlers for Medusa is OP cost, and the extra range is a bit wasted if Medusa needs to approach the target to use blasters.
I would try the needler and phase lance combo that was effective in 0.7x, if I had Advanced Optics.
Which is why I think you overvalue Converted Hangar. It's not for player-piloted ships (unless solo, and dubious even then).
Solo is exactly why I want the Hangar. I do not want to deploy a big fleet in every fight if I can get away with deploying a ship or two. If a Hangar will let my Medusa solo a cruiser, I will take it! Currently, Medusa trying to solo a cruiser is too hard - outranged and outgunned! (Hammerhead on the other hand, can sometimes kite-and-snipe bigger ships with some success.)
Also, trying to kill Remnant frigates with Medusa is annoying because of poor shot range and limited mobility. Now, I just deploy Condor or Drover and make them go away fast. If Hangar will let my Medusa sweep a couple Remnant frigates much more efficiently, so much the better.
The hangar is a substitute for missiles. I tried Salamanders, but they are much easier to stop than before. I tried a wing of fighters, and they are more effective than any puny little Salamander pair my ship can mount. Fighters would fill the improvised Salamander role.
Before 0.8, I posted that I would experiment with Hangar as a substitute for missiles. Results were better than my expectations (which were low).
Beam weapons generally have the longest ranges in the game, outside of missles. You sacrifice burst damage for sustained DPS, but Speed+Range generally equals GG in most cases. Most of the higher tech ships are designed to efficiently melt ships while hovering out of their effective range and hiding behind quality shields, then quickly moving in for the kill with shorter range burst weapons.
Midline ships do that job better, because they can back up long-range beams with long-range ballistics for devastating effect. Eagle has always been good at this. So was Falcon. Now Hammerhead joins Eagle and Falcon at effective long-range beam-and-ballistic sniping. Even Sunder can use HIL effectively because they can mount light needlers to put hard flux on the shield.