I’m very close to finishing up my 80 DEX Crow Quills character myself. It’s been a while since I took a character through the entire game - usually I keep Aldrich and Dragonslayer Armour alive to keep invasions open - but yesterday I cleared the Grand Archives and got the Outrider set, which just looks totally badass and beautifully matches the aesthetic of the Quills. Before that I was wearing the Undead Legion Helm and the Black Leather Chest, the latter of which has a female model that looks way better than the male one.
Oh, and the other reason for donning the Outrider set is that I’ve been using Frozen Weapon after a tip from someone: Buffing the weapon with poison or frost causes the quill darts to inflict that status build-up as well. This is relevant because you can throw four quills at very close range, and they’ll inflict four times the usual build-up, even if the target is in rolling iframes. With the Quills being a combo monster, you can trigger frostbite on the target before they even know what hit them: R1-L1, L2-R2-L1 consists of two combos that are practically a guaranteed kill on any player when the weapon is buffed and fully upgraded. I also like that the running L1 has poise and is unparriable, as well as comboing into another L1. The hitbox is the size of a needle but it’s so satisfying when it hits.
My secondary weapon is the Aquamarine Dagger but obviously I haven’t used that as much given that I took the long way into the second DLC. I considered using a spear as my secondary weapon since I called my character Pokey but my options are limited since I’m keeping my STR at 10, and I already have INT for Frozen Weapon so the dagger seemed like a cool choice.
As for left-hand weapons that attack instead of blocking, the only ones are weapon catalysts, which in the offhand have an L1 attack and an L2 cast. My personal favourite is the Rose of Ariandel but since it lacks Unfaltering Prayer, talismans have a big advantage over it. I also have a character with a Murakumo and an offhand Demon’s Scar, which I use for quick swipes and Boulder Heaves. I’ve yet to try a proper sorcery build but it has all the weapon catalysts, from the shitty-ass Cleric’s Candlestick and Golden Ritual Spear to the actually-decent Heysel Pick and Immolation Tinder. Take your pick.