Converting The Speaker in Dreams Adventure: Need Help with The Blessed

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I need help with The Blessed.  In the 3.0 module The Blessed uses monster summoning scrolls to summon 2 Wystes.  I need help to model her power.  I have converted the Wystes but I have only given them 1 attack not 7.  Currently, I have the Wystes as 5th level brutes but I am thinking of making them artillery since they have reach of 2.

What would be the best way to model The Blessed's ability to summon wystes in combat?