Weapon master

At 7th fighter level, choose 2 weapon groups. Performing maneuvers and combat maneuvers and special attacks with weapons of the chosen groups do not cost an extra bonus action.

At 7th fighter level, gain an extra fighting skill tree upgrade.

Gain another at 8th and 9th fighter level.

At 7th fighter level you can spend 4 rest dice as a bonus or move action to immediately gain an extra turn right after your current one. 

You cannot perform an action surge more than once per round.

At 8th fighter level, choose 2 upgrades from the list below:

• Ambidextrous - Gain a +1 bonus to sleight of hand and athletics checks, and checks made to disarm traps. You can wield non-light weapons in your offhand at no attack or damage penalty. Gain a +1 bonus to AC when wielding two weapons.

• Bonded weapon - You can attune to weapons from your arms of choice selection during a rest. Doing so increases their damage dice by 1 size category while you wield them. 

• Diversion master - All non-first swing, double-strike, clutch, and swift attacks have a +1 bonus. Gain a +1 bonus to deception and performance checks.

• Dozen strikes - When using action surge by spending a move action and wielding an arms of choice weapon, you can forfeit your next turns movement action in advance to gain an extra attack this turn and next turn.

• Immediate action surge - You may perform action surge as a reaction instead of a bonus or move action.

• Master of arms - Choose 2 extra weapon groups to benefit from your arms of choice ability.

• Perfected motion - Choose 2 weapon maneuvers. The attack rolls and DCs of those maneuvers you perform gain a +2 bonus. Gain a +1 bonus to athletics and acrobatics checks. Can be taken multiple times, each time choosing different maneuvers.

• Symphony of combat - You restore 1 rest dice and can perform a second wind at no bonus action cost when landing a critical strike.

• Strike projectile - You can make an attack with a versatile, one-handed, or agile weapon as a reaction to a ranged attack thats trajectory intersects your reach or targets you. If it equals or exceeds to the projectiles attack, you slice it with your weapon and negate the projectiles attack.

• Untouchable master - Gain a +1 bonus to AC and a +2 bonus to dexterity saves and block checks. Gain a 5ft movement speed increase.

• Wind-strike - Your arms of choice weapons gain reach I and deal 1d3 extra force damage.

Choose an extra upgrade at 9th fighter level.

At 9th fighter level, you can spend 2 rest dice when making an attack or maneuver to allow it to ignore resistances, ethereal effects, illusory dodge or miss effects, and damage immunities. When doing so, increase the attacks damage by 3d6 of any damage the weapon would deal.