I really like the crescent moon sword as a back up weapon. it has the moonlight special nuke, but you dont need any int.
combine it with simple infused warrior shield and you can spam it as much as you like, every 4 seconds. I nearly even beat a havel shield meta user with the nukes, aiming unlocked. definitely can chip peoples HP.
currently main weapon is irithyl rapier. I think its more damage than estoc but requires quality, but also has higher critical damage and does frost (not sure if ever procs in pvp).
combined with blessed infused buckler, and leo+hornet ring. you got some insane riposte damage, hp regen, strong r1 damage, parries.