New weapons attacks are nothing compared to the potential disruptive power of allowing two full spells per turn.
Two? O_o
I would say up to Five ... as long as you keep using Fire Chromatic orb.
https://baldursgate3.wiki.fextralife.com/Circlet+of+Fire //Edit:
Actualy Six ... if you also use Potion of Speed.
And im not quite sure how will that Illithid power work ... i mean how often will it gave you Sorcery Points.
