Sylvester Archipelago

Shaman, you've got it slightly wrong. Skills are one-handed weapons, two-handed weapons, healing magic, etc. And what's listed under them are the abilities.

Defensive Aura
Phantom
Luck
Sorcerer
Scout

So, you spent 10 points, not 8. Should we remove the Scout?

Oh, yes, there's one more thing I wanted to ask: do you need to spend skill points, ability points, or both to master "additional abilities"?

Only skill points.

Added after 25 minutes
And also, there are no revolvers yet, only pistols and flintlock rifles.