[Beorne]

I'm LA R'lyeh vs a very strong LA Ermor.
I'm smashing on one of his big armies (800+).
I have prepared a communion with 12 slaves and the Stargazer with Astral 5 to cast Solar Brillance.
I've read it causes blindness and I presume this means the permanent affliction. I'm not worried blinding the mad chaff, but I'm very worried blinding my 25 starspawn and my illithid artillery.
Are blind mages able to cast ranged spells? And are able blinf illithid to fire the mind burning weapon ... (I fear not) ?
Some hints?