There were plenty of reasons for Tycondrius to prevent Krysaos from dying.
Due to his nautical expertise, the gentleman-Captain remained Tycon's most reliable resource in reaching Archangel safely and in good time.
On a personal level, Krysaos was a pleasure to converse and interact with.
...And admittedly, Tycon was still somewhat annoyed that his fool companion, the Lone Shadowdark, was so-affected by the domination spell-effect of the Swords of the Forgotten King.
Grabbing hold of the Elven sovereign's wrist, he redirected the piercing strike away from Krysaos' chest.
It was enough to keep the man alive but not to keep him unharmed. King's hand grazed the Captain's shoulder, cleaving through the thick material and drawing blood.