Thats what I got so far, any idea how to progress form lvl 6 on?
Tiefling (demon spawn) Monk (master of many styles) 1
LN Medium outsider (native)
Init +2; Senses Perception +6
DEFENSE
AC 15, touch 12, flat-footed 13 (+2 Dex, +2 armor, +1 natural)
hp 10 (1d8+2)
Fort +4, Ref +4, Will +2
Defensive Abilities resist fire 5
OFFENSE
Speed 30 ft.
Melee unarmed strike +4 (1d6+5)
Special Attacks stunning fist (1/day, DC 11)
Spell-Like Abilities (CL 1st; concentration +1)
1/day—darkness
STATISTICS
Str 18, Dex 14, Con 14, Int 10, Wis 10, Cha 10
Base Atk +0; CMB +4; CMD 16
Feats Nightmare Fist, Improved Unarmed Strike, Dragon Style, Stunning Fist
Traits Quain Martial Artist, Dominator, Brute, Paranoid
Skills Climb +8, Intimidate +5 (+7 to demoralize), Perception +6, Swim +8
Languages Common, Abyssal
Combat Gear ; Other Gear leather armor, pathfinder's kit, light wooden shield
1 moms nightmare fist, dragon style
2 moms dragon ferocity
3 brawler nightmare weaver, weapon focus (unarmed)
4 brawler power attack
5 brawler fiendish darkness
6 brawler weapon spec
Edit: I forgot to include scaled skin and prehensile tail.
As a note, due to a FAQ about Spell-Like Abilities, Casting, and Prerequisites, you qualify for feats that need spellcasting because you have a SLA. And since it is racial, that means you get a caster level equal to your character level.
Why is all this important? Because it means that you could take Arcane Strike as a feat, which could really help your damage for only your swift action. I mean, with dragon style matching strength, and this making up for the power attack difference, you will about hit like you had used a 2 handed weapon (although this has the distinct advantage of flurry on top of similar damage on each hit). Just as a thought of something to throw in if you find yourself with an extra undecided feat. Not even entirely sure if it interferes with any of your stuff (well, other than getting style feats prepared)
EDIT: looked into nightmare weaver and how it qualifies as dazzling display for some prerequisites. You want to take Shatter defenses and deadly stroke as soon as you can (also requries greater weapon focus; not a bad thing though, and it will take a while to get the +11 BAB for deadly stroke anyway). I mean, with nightmare weaver, you can shake opponents, and then use shatter defenses on them to make them flat footed to your attacks. After that, deadly stroke allows you to do a standard action attack that deals double damage and adds CON bleed of 1. Seems very useful, and it gives you a very, very punishing option to use on anything that tries to run from your full attacks.