Anything from 15/24 to 27/12 is considered a "good" build. Take agi builds if you know how to block and do your footwork, or take STR build for easy mode and 1-2 shotting 
As a ninja my agi made sure I didn't have to block much. You can take agi builds if you can't block, just get a longish weapon and dance in and out of range.
What is good build for Miadao? I'm usually a player who rushes to most biggest gangs, where the fighting is most biggest. My current stats are 18/11.
Should I go more tank like? I use now vaegir armor, which can take few straight hits from swords. I like 2h most of all, and going for pure 2h build. Can people with more experience tell me about good build, weapon and armor?
Thank you
First go 18/18 and then decide if you would like more movement speed, or if you want to be slightly more hardhitting and then go for 21/18 or if you want more movement speed 18/21 on lvl 30. Use this so you get it right
http://infinitum.dyndns.org/crpg/calc.htm.
Miaodao is a very good weapon, with top tier cut damage and high speed, it lacks a stab though. Most 2h prefer one of the western greatswords. Just pick a few of them up and see if you like them better.
Armour doesn't really matter, higher armour gives you more protection but slows you down, lighter armour the opposite. Go with whatever feels right. Most twohanders use a body armour with around 12 weight.
Don't go too expensive on leg armour, just use mail chausses, the amount of leg hits you take is really small, and they do 0.8 damage anyway.
