Achieved Cavalier today! After months of putting it off I decided to power through. Forgot to take a screenshot upon finishing but here's the team I used. Overall took me some 700 units (all F2P) worth of revives and potions to complete it. I had a 30% health and attack, 30% health and 15% attack boosts active for the final quest.
P. S. Claire is amazing for the Crossbones fight!