You can add abilities to items as well. If you want to add critical strike to an item, just create an item-ability (based on "Critical Strike (item)") and give it to the item (in the value "Abilities - Abilities").
Same goes with immolation (Cloak of Flames, as TwoVenomous already said), or Bash, or even active abilities.
If that doesn't answer your question, you will have to be more specific.
From what you told me, there's no need for triggers at all (and making a trigger for all kinds of item effects on pickup requires an entire system).