Are these two sentences worded correctly?

As Quenthel’s band was making its way back to Menzoberranzan, the matron mother met with Gromph and came to the realization that the archmage was truly one of her most valuable and mighty allies. Quenthel later spoke with Tos'un and Doum'wielle, whom she planned on using as a way to gain an advantage over Mez'Barris in order to further strengthen her hold on Menzoberranzan.