Thoughts on the skills so far: Lvl 5: Shoot n Scoot- Faster movement while aiming or Quick Draw- Weapon swap speed increased
ADS is horribly unnecessary in this game, since hipfire is super accurate. Its only really used for the long range shots which you'll want to stop to line up on the small target anyway. I don't see anyone really using Shoot n Scoot.
Lvl 10: Rhythm Method- Each head shot will increase your damage or Bone Breaking- Overall damage increase
I am stubborn about going for headshots always, but I'd still take Bone Breaking if Rhythm loses its damage bonus once you hit somewhere but the head. The big deal breaker is the other perks. The T4 perks offer a lot of utility with stumbles or knockdown, but you have to aim somewhere but the head and Penetration would mean shooting a shorter zed with a tall zed behind it would lose the bonus. Rhythm looks good on its own, but other perks look like they'll hose it, unless non-headshots do not break the stack of bonus damage.
Lvl 15: Speed-load’n – Faster reload or Penetration – Additional penetration
How does bullet penetration work with a .45 or a cap and ball revolver? Still, besides the aformentioned possible problem with Rhythm Method and Penetration (.. those two perk names do not sound right in the same sentence) both T3 perks look like fair choices.
Lvl 20: Center Mass – Increased stumble power with body shots or Knockdown – Increased knockdown power when a sprinting zed is shot in the leg
Knockdown is always better than stumble. Especially since stumble on a chest shot would be too easy to accidentally proc and screw over a zerk. This is kind of a one sided choice.
Lvl 25 (Zed time): Fanfire - Faster firerate or Uber Ammo - Unlimited shooting without reloading in zed time
The low ammo capacity of Gunslinger guns kind of makes this one sided too. Empty 10-16 rounds minus the ones you already shot before zed time started quickly, or unlimited shooting for a bit. Hmmm...
Passives: increase damage, recoil control, bullet resistance, MOVEMENT SPEED
Rip commando.