I didn't see city of Demons, but I needed a demonic/distorted voice for the Aether, though the voice of Nergal is the SK voice, Tourmaline's is Hades (Ralph Fiennes) more breathy and like soft sandpaper. It chips away at you making you listen.
Whilst the Sk's voice whom we only so far have seen only once is a much deeper.

As for Tyrhallan: 
But no the mount isn't dead, but it is not going to stick around in the middle of a warzone to be shot to pieces, it will fly higher and out of range, Tyrhallan however has always used his boosters and ki in combat that is so chaotic.

So for your visuals, we have troops on the ground and in the air. The ground troops mainly form the last defense for the city, using the ballista's and other heavy catapults to fire and cripple the enemy.
The large frigates however fly in releasing those smaller crafts so they can stop the approach of smaller fighter vessels and the famous dragon knights, leaving them to blast the city and the ballista's again.
It is just one big mess like WW1 with the Aces flying and fighting above, whilst the trenchwar was fought out on the ground, with raids happening back and forth.

The small manned crafts, think like a hover scooter idea can carry a couple of soldiers, depending on size. These are to counter the Dragon Knights since they have fought Belisio before and know how dangerous they can be and this was their solution for it.

Also decided to put the fate of the kingdom in your dice roll and you did not disappoint there ;)
Though we're not out of the woods yet, you'd better watch your coming steps....

No more Castle at least and Olysium will fall and be overrun. Now let's see how many will survive.