When I made my first monk, I kinda knew I was going to have to re-roll him. I just wanted to learn the class, but I still have trouble with getting some of the finishing moves to kick off (they usually die to early lol). Having played dark monks, I let myself be persuaded to switch to light monk, and I must say that it suits the build better anyway.

You really do need all stats. One problem I had with a dex based dark monk is generating ki for tod on enemies. My current monk is kinda str based, well to be honest, he is str, dex, con, wis based, and I often switch between air, fire, and earth stance. Two weapon fighting is a must have btw.

I also have the halfling healing dragonmarks on my light monk, and have found them to be very useful.