Level 3
Fencer's Strike.
Roll one more Focused Strike damage die when you use it against a creature you taunted. On crit, regain the Stamina expended for Focused Strike.
Let's Duel.
(1/round) Free action: taunt a creature you can see (it loses this condition when you're Incapacitated, someone else taunts it, or you taunt another creature). While it has this Taunted condition, your attacks have Advantage against it.
Level 7
Just a Feint.
(1/turn) When you miss an attack, make another attack for free, dealing extra DEX damage and gain STR Stamina on hit.
Level 11
Fencer's Strike (2).
Upgrade the damage dice by 1 step (d4 to d6, d6 to d8).
Level 15
Keeping Tempo.
Gain 3 Tempo/Safe Rest. Consume to use one of: (1/turn) Free action: at the end of the turn, gain an additional action if you haven't missed an attack; (1/turn) Free reaction: make one attack miss (does not work on attacks that can't miss, like an AoE attack).