What Astral could have done: strike Ninahisami with his sword, paralyze her (the chances of paralysis were high), then hit her with Rezara and apply a bleed. Ninahisami would have skipped her turn due to paralysis, lost her defense stack, and would have been finished off by the next turn.
What Astral did: ...
Unless, of course, he plans to break her sword with his Sundering.
Lorican moves.
Orvald's turn.
Orvald stands over Frizmist and strikes her with a precise attack to the noggin.