Simple build that has been done before. Mysterious Stranger 7 / Paladin X. After a lot of thought on possible combinations this combo is probably the best choice for a Mysterious stranger gunslinger. The concept is to create a gunslinger who is stupid hard to kill and still do decent damage. Cha is THE stat. Everything else is secondary (Dex and Con) or tertiary. It gives him damage, grit, misfire ignores, smites, LoHs, and ridiculous saves.
LG Human
Str 8
Dex 14
Con 12
Int 8
Wis 10
Cha 20 (+2 racial included)
1: Paladin (OoV, Sacred Servant) - Point Blank Shot, Precise Shot
2: Paladin
3: Mysterious Stranger - Rapid Reload
4: Mysterious Stranger
5: Mysterious Stranger - Extra LoH
6: Mysterious Stranger - Rapid Shot
7: Mysterious Stranger - Extra LoH
8: Mysterious Stranger
9: Mysterious Stranger - Improved Critical
10: Paladin
11: Paladin - Critical Focus
12: Paladin
Any ideas on a domain choice? I would get it at ll, so it isn't too important. My thought was to go luck domain. I could Bit of Luck myself before combat and then have a very nice chance of a crit on my first dead shot. One shot one kill the enemy boss (Vengeance) and then ask for surrender from the others.
Another option would be to take divine hunter. This gives me Precise Shot for free and frees up a feat slot for Fey Foundling or something else. I don't get the late domain but what I do get is something I can use for an additional 10 lvls of play. Very tempting. At lvl 9, I could also choose to retrain rapid shot and point-blank shot into other feats (extra LoH and a combat feat) since I would be focusing more on Dead Shot.