Poison Confusion

Hey guys first timer to a poison build this league. Im so confused as to what is the best option to scale my dps...we've got crit % crit multi psn damage chaos multiplier poison duration phys dmg flat chaos dmg attack speed christ there's more im sure...is there any guide/rules towards what is best for scaling? Im sure different builds would vary maybe? Maybe not idk, does anyone have any useful info on these stats and what to prioritize when scaling up or crafting a dagger?

O_O

anyone able to shed any light on this or nah if you want to look at my char or tree its the bino char not sure it matters.