I didn’t say that the Scorp Navy can’t 1 shot frigs @100+ km, I just said you have the added flexibility of doing it either way, and sorry, but function flexibility is always a big plus.
Now it also happens to be skillwise on the way towards Rattlesnake, which is also by far better then Barghest for the purpose which OP stated. In fact, you can fit up a very nice mid price, cruise missile focused RS with fairly decent application and around 1600 cold DPS for around 1.6 bil. and it will far surpass the Barghest on all fronts. You won’t be able to solo epic arcs in it or do L5s, but you can do L4s very comfortably.
In addition, OP did not state, but I use the Angel Extravaganza ship performance as a benchmark which roughly (some minor differences) lets me see if a ship can or can not handle the epic arcs absolutely solo. No dual boxing, no help or grouping or fit or ship switching necessary. 1 ship, all that content.
If you have never done epic arcs then you do not know but you can be 130-160 km out and you still need a really good tank. So ships such Raven, Raven Navy etc. are out of luck. Some people like to dual box tanky Tengus for it, works too. Some do it in like 4 bil super pooper blinged Rattlesnakes, works too, I do it in a 1.3 - 1.2 bil (pending market swings) Navy Scorp. It is a very tough ship. Yea it doesn’t have 1700+ cold DPS of a Rattlesnake, but it still hits a nice and comfy 1k up to 130-140 ish km while retaining a 140k+ EHP omni tank and have application to choose and fly around as you see fit at any given time instead of being constrained.
On top of that, double prop mod on a battleship is the bomb. Sorry but anyone that has done any serious farming on a double prop BS knows its value. Only time you’ll ever go back to single prop is if its a part of a doctrine and you have no choice but to fly it and have to cringe through it. Its utility is priceless.
Incidentally, to 1 shot regular frigs when they’re lined up you only need like 250-300 DPS, to 1 shot the elite frigs 400-550 ish, depending which exact ones. The DPS is completely irrelevant, all that matters in the end is number of volleys, which remains mostly the same, in fact, it remains the same even on most battleships. The only time you will notice a difference is on the elite Amar or related factions battleships as they have extra tank, and even then its like what extra 5-10 seconds each ? No big deal, make that up and surpass it the 1st time you have to go dock up to switch hardeners in other ships.
So in this context, I made made the assumption due to the extravaganza room comment on original, but neither the Barghest or Raven or Raven Navy have enough tank and slots. 100km + of off MJD is only enough in basic L4s, not much beyond that.