Are these two sentences worded in the correct way?

FYI- Szass Tam is the lich/undead mage. A few days later, Szass Tam met with Dmitra Flass, the tharchion of Eltabbar and a Red Wizard of Illusion, to discuss the murder of Druxus, who had been one of the lich’s allies on the council of zulkirs. Szass Tam commanded Dmitra to use the large and extensive network of spies and covert agents that she operated on the undead mage’s and her own behalf to arrange for Samas Kul to be chosen as the new zulkir of Transmutation, since he would ally himself with the lich.