Navarre is probably the most underrated F2P swordsman in the game right now.

This just proves further the point that any unit in the game can be viable, with the right skills. Your Navarre looks very nice!

By underrated, i think u mean “garbage bc of powercreep”

The reason nobody uses him is because fir exists.
If we are talking ft2, fir, who can easily be merged to +10 and has a pretty good prf outclasses him without breaking a sweat.

Given you are still using Desperation with him Brazen Atk/Spd would be a lot better than LnD, as keeping his defenses up would help him survive into the Desperation zone.