How about a second swing for a fighter?
Backswing
Get them in the rebound. Gain the following benefits:
Thoughts?
time to keep this idea going
Fighter, Barbarian, Champion, Ranger
Trigger A creature within your reach makes a melee attack targeting you.
You slash at your foes blade to knock it aside. Make a melee Strike against the triggering creature. If your attack is equal to a higher value to the triggering attack, you knock the blow aside and the attack does not hit you. This Strike doesn’t count toward your multiple attack penalty, and your multiple attack penalty doesn’t apply to this Strike.
Thoughts?
And now to starfinder!
Fast out of the gate means there is no round two.
Benefit: You gain a +2 bonus to all attack rolls and skill checks in the first round of combat.
Thoughts?
More fun right out of the gate.
General
If you hit hard enough in round one, there is no round two. You gain a +2 circumstance bonus to attack rolls and skill checks in your first round of combat. This starts at the start of your turn and end at the end of your turn.
Thoughts?
Time to win the initiative war!
Starting Line
You like to work quick and efficient. Gain the following benefits:
Thoughts?
Ok, one list luck feat-now for Pathfinder 2nd Ed!
General
You always are a boon to those around you! When you or another creature within 30 feet of you spend an hero point, that reroll gains a +2 status bonus.
Thoughts?
Better to be lucky than good.
There is always a reason they keep you around.
Prerequisites: Diplomacy 5 ranks
Benefit: When an ally or yourself spends a resolve point to do an action, that action either gains a +2 luck bonus any d20 roll or the target of the ability gains a -2 penalty any associated d20 roll.
Thoughts?
Ever fire a round to clear the way?
Flourish Gunslinger
Trigger Your attack with a firearm misfires.
Sometimes you just need to clear the barrel of all the smoke to make it fire. When you misfire, you can spend a round and fire to clear the chamber. This removes the jam as an interact action and cant be used on the same gun until you take an hour to fully clean the gun fully.
Thoughts?
How about some love for 5e?
Take 5
Use your talents to the most of your ability. Gain the following benefits:
Thoughts?
Turns out a reroll is equivalent to adding five to a roll. Sometimes let’s just exclude the randomness.
General
Focus on the goal! When you use a hero point, you can elect to either reroll the die or add +5 to the dice value. If the new value would instead cause a critical either as a natural 20 result or the total result being 10 over the DC, treat it as if it was a critical . Dice values over 20 do not cause a critical result unless the total is 10 over the DC as normal.
Thoughts?
Throat Punch Games 