Skill points: 2+Int.
Skills: Concentration (Con), Balance (Dex), Jump (Str), Ride (Dex), Spot (Wis), Hide (Dex), Move silently (Dex), Listen (Wis).

Class features:

1-5: something cool but mundande and martial
6-10: something really cool and maybe unlikely but consistent with the class
11-15: you can go to supernatural territory.
16-20: this is the WTFOMG!!! place.

Example:

Deadly precision [Ex] (lvl 1): You can addition your dex mod to damage. This extra damage are precision damage, so creatures immune to it will not take it.