Poise breaker ash of war for dagger ??

[Theo]

need a good ash of war to make poise damage for a crit misericordie build

[Humpenstilzchen]

impaling thust is not bad. It does decent poise damage, pierces shields and afaik it can be put on daggers.

You could also use a shortspear with spectral lance in your second right hand slot whichdeals even more poise damage than impaling thust and allows you to break poise on distant and flying targets.

[LuckyCheshire]

Daggers do not do good poise damage. Generally, for a Misericorde crit build you want to either focus on parrying or use a different weapon to break the poise and switch for the critical hit.

If you really want to use an AoW on a dagger though, Lightning Ram is a good one, especially if you have some decent poise yourself. Otherwise Cragblade, or maybe Flame Spear.