If I recall you need have a unit to step on the space where the cursor and Alphan (boss) is alive so Sety will show up, I'm not sure why you didn't get Cyas that also happened to me also when I didn't get Sety.
Isn't one of the problem with Bors in hard mode is him getting doubled? unless he gains speed in his level ups? Yeah his 40% chance to gain speed and 35% to get defense is good but still a chance to get them stat ups.