If you want to get anything from the General Combat Ace page, you must pass the Barrier Of Entry for the General Combat Archetype. this means you need:
Superior Tactics & Opportunity Attack : Combat
Champion Surge
Requires Barrier Of Entry : General Combat
When you use your action to make an attack with a melee or ranged weapon, you are able to make another attack with a melee or ranged weapon as a free action.
You must have at least a +5 bonus with the weapon, which can’t be a firearm, in order to use this ability
Master Tactics
Requires Barrier Of Entry : General Combat
As long as they’re battle techniques, you can use up to three battle techniques at the same time. If multiple battle techniques involve a saving throw, one saving throw type will combat all three.
Prowess
2 Point | 3 Max
Requires Barrier Of Entry : General Combat
When you miss a weapon attack, you can reroll it as a free action.
Trained Fighter
4 Points | 1 Max
Requires Barrier Of Entry : General Combat
Within the range of your melee or ranged weapon, you have true sight.
(Meaning that no creature is able to stealth against you and you see them no matter what)
Weapon Master
4 Points | 1 Max
Requires Barrier Of Entry : General Combat
If you get a 1 on a weapon damage roll. Reroll it until you get a higher number.