Regarding the kings and Queens, how are sessions usually supposed to go?

In a normal Session, the King and Queen would just like. Be there ordering the Army and the Agents respectively, without being dethroned early or anything. You’d need to face the Black Queen on Derse as a first Endgame Boss, and then the King in the Battlefield, before the Reckoning destroys Skaia. Arguably you may only need to kill the Black King to stop the Reckoning, but given the Queen may be a liability if she attacked you while you’re facing off against the King, it may be for the best to take her out first.