Timerift And Powder Special Question

I have two main questions: The first is can timerift stack curse and/or courage? Second of all, if I cast curse or courage with one weapon and then switch to another, will the effect persist?

 

I believe sorcery can stack curse but not courage. I think they persist when you swap but I’m not 100% sure about that.

 

you can stack all weapon powder specials with sorcery afaik

 

I know curse 100% will stay with the enemy as its an effect that is attached to the enemy once used in an area of effect. Though I think only the strongest effect will apply to an enemy. Though different powder specials will stack the damage, but I am not sure if courage persists when changing weapons.