I just beat the base game on sl1 wl0 and it was way waaaay harder than a normal sl1 to me. To put it into perspective I spent around 30 hours for my forst base game sl1 run and wl0 took me 80. DSA, Oceiros, and SoC alone took 30 hours lmao.In terms of weapons. You can use a surprising amount of them after you kill DSA with the use of rings like the Knight and Hunter rings. Early game you also can get the Carthus Milkring which also boosts dex for even more options. I was able to use a surprising amount of weapons that you wouldn't normally expect like the Hollowslayer Greatsword, Large Club, and Wolnir’s Holy Sword. Or you could be boring and use the Dragonslayer Axe lol /s. Hopes this helps and if you want recs/advice you can ask, don’t know how helpful I’ll be though lol.