Have to agree with Rane. See no reason the Seguleh First would even be interested in the Throne as it is. Also you seem to be selling Dasseem a bit short in ability. As this passage from from the books says this is not a man to cross.
"...Dassem had clashed with them for decades--and that alone was enough to give anyone pause regarding their prowess. It was said the Avowed were unstoppable, but Dassem had slain every one who had challenged him: Shirdar, Keal, Bartok. Only Skinner, they say, had come away alive from their clash." (Temper) (NOK, PSP HC, pg. 24)