I think she's technically a lesser power/quasi-divinity at this point, on similar to or slightly below the rank of one of the (post-Second Sundering) Dead Three. The fanatical worship of (some of) the Githyanki over her long (un)life have taken her already exceptional arcane power and brought it to the edge of godhood, where the rules that should apply to mortal spellcasters no longer hold. IIRC, she's actively trying to achieve full godhood by enforcing her worship through her Inquisitors, with mixed results.