Well, the title of this threat already tells the core of my question.
There are several item sets in ESO where the set-bonus says: "Casting a spell..." or "While casting or channeling a spell..."
What exactly does that mean? Does the effect only occurs on spells with a cast time? Or do spells with instand cast time also trigger these effects.
For example Soulshine Set: Do i get the spell power bonus for instant-cast spells as well?
For example Lord's Mail set: Do i remove negative effects with any spell i cast even those with noch cast time?
For me that would be a very important information if those set boni are interesting for me. My focus is on PvP and i prefer instant-cast spells thats the reason i am asking this question.