If Myrmidon 3 dies from the attack:

Seeing the enemy swordsman fall, Ossler takes his opportunity.
"Milord, we appear to be pushing back the attackers!"

Move to F7, attack thief 6 w/Iron Lance.

If Myrmidon 3 survives:

Ossler watches the uncannily quick enemy swordsman dodge the mercenary's attack. Rather than allow this potential ally to fall, he steps in and delivers a blow with his lance.

Move to D7, attack Myrmidon 3 w/Iron Lance.