Sagan & Maigrey winning the space fight against the Corasians (The Lost King). Just the two of them on small spaceplanes destroying a giant mothership - how awesome is that?
Sagan & Maigrey entering Snaga Ohme's hall to the sounds of the Golden Squadron March (King's Test).
The exchange in Ghost Legion:
Flaim Starfire (asking why Sagan chose to stop him at the cost of his own life): “Why? Why? I was everything you wanted to be!”
Sagan: “That is why.”
The entire mountaintop fight in Ghost Legion where Xris, Kamil, Astarte and Archbishop Fideles band together to stop a group of trained commandos, despite two of them being popes, only the other two having guns, and only one of those knowing how to use it.