https://wolcen-universe.com/builds/OxNneg-dagger-ailment-test

I dunno if this is good or not, but it's what i've been building so far.
as for stats, get enough wisdom wo have around 30-40% chance to inflict ailments
enough ferocity for around 30% crit chance
then allocate in toughness /agility as you wish. Currently i only have 250 toughness but im using heavy armor (for resistances, so i can spend more points in agility)
For gear look for ailment damage, and try to stack different ailemts with skills too, so whem you kill an enemy you get a big burst of damage for each stack that was inflicted on that enemy, thanks to Cabalist's passive, Immortal offering (for example, mark of impurity can inflict curse on an enemy, and you can take the ability that can spread the mark when you kill an enemy, giving you tons of stacks and damage, also, Sovereign shout can cast Weakness on enemies. That makes 4 ailments; poison, bleed, cursed and weakness, and gives you a ton of extra damage to clear)

Hope it helps, im having fun with this one, once i get better rogue gear im planning on mixing so i get a decent dodge chance, and some heavy armor for resistances, but for now im sticking to heavy.

Good Luck!