Best weapon in the game

[Cristiano Ronaldo]

is there any weapon in the game which is objetively the best in the game? im a dex/arc and ive tested out so many weapons and still dont know wt has the best dps and damage output

[Xengre]

Agreed with others. Unless you're specifically referring to just abusing a specific broken Ash of War spam that is extremely all-rounder against everything, bosses included, there isn't really a best. Pick a weapon for each situation. Miners or a fort where you often can sneak up on people? Stab them in back with Misericorde. Flying enemies? Don't care if you have 10 in Int throw the basic pebble spell at them. Dogs and horse (non-boss) enemies? Thrust attacks are ideal, but anything with extended frontal reach will work. Huge HP pool but weak rather than resistant/immune to bleed? Use a blood inflicting weapon/buff. Undead? Holy dmg to permanently kill and nuke them.

If you just want some great all rounder, none are best. Ex. the spinning attack on Marais Executioner's Sword is probably still the strongest single target anti-boss attack in the game... meanwhile, Wave of Gold ash of war from Sacred Relic Sword that you get from the Final Boss is indisputably the best all-rounder AoE for basic mobs with its high dmg and hilarious DBZ styled range... if they're not immune/very resistant to holy or a single powerful normal mob with unusually high HP. As you can see, there are two options which are very extreme above other weapons so there can't be a "best weapon". However, there can be said to be some Ash of War or weapons that fall into the category of being extremely competent on both points.

Further, does your question include magic options?