Quote Originally Posted by Avalt View Post
If you look closely at one of the Astrologian offensive spells, it inflicts a paralysis/stun effect (you can see the Ebst with some jagged lines around it)
Good observations. That's one I missed. Looking closely at the video it looks like the stun effect is applied by the last offensive action used. Watching that particular action has left me perplexed as it doesn't have a normal casting animation, but it also seemed slow for an instant ability. It's makes me think what we're seeing are two different actions used quickly back to back.

While this could be considered wild speculation, what it looks like is the Astrologian uses their own version of Swiftcast, followed by an off cooldown stun action (certain abilities like Fluid Aura won't expend the buff), then finishes with an AoE spell that casts instantly. It's entirely possible that the last spell used is instant by default and we'll never know until we see the details first hand, but having their own Swiftcast isn't at all an unrealistic possibility.