>Scimitar doesn't have the PKCS rollcatches and lower range than CCS
Excuse me sir, when two handed it has more range than CCS.
>Claymore is a very unremarkable GS in terms of gameplay
That doesn't mean it's shit at all, it has a god-tier moveset with the basic R1s and R2 pokes and that's all it needs, plus it has 550~ AR on 80 Dex both one handed and two handed unlike 66 STR Heavy which only reaches that AR two hand.
>LKGS has high AR but split damage so it's mostly shit
That is such a meme answer, it's split damage is very high and you are ignoring how it is buffable on top of that so with Gold Pine Resin/Bundles you will have insanely high physical and lightning damage,
>Murakumo
It's longer range and takes more stamina per R1 than EGS so it has positives and downsides but it's definitely the best Dex weapon in the class still and no reason not to use it on a Dex build.
>Lucerne
>Discount EGS
What.
>Winged Spear is worse than Gargoyle
In damage not really since the nerfs to Flame Spear, sure Flame Spear has more range but Winged Spear will outdamage it due to being pure physical damage which benefit counters. Though if you're using a spear on a dex build you might as well just use Plow or Long Spear.
>Finally, how much would 20 or so AR matter in a duel?
A lot depending on health as that can literally make the difference between a killing blow or not, plus the boost from 40 to 80 Dex is more like 40-50~ AR and not just 20.
>How much of the time would that stat investment shave off a single hit when compared to 6 fth for a blessed weapon?
I think you mean 15 Faith or 10 Faith plus Priestess Ring. And Blessed Weapon only has good damage returns on high AR ultras anyway so that's a moot point when talking about smaller weapons. An 80 Dex Lothric Knight Sword or Estoc would actually get more benefit from it compared to the average Strength fast weapon while Astora's Greatsword or Murakumo would benefit just as much as equivalent weapons.