He flipped a tank.
Ran through a bunch of machine gun fire, dodging the bullets.
Swings his sword so fast it..uh....catches fire from the friction...seriously.
Takes on leagues of 10xhuman or so super soldiers.
He can definatly take out Batman.
The old GI JOE comics are pretty good reads, and SE is a tough customer.
Strength is maybe a few tons or less. Reflexes are compairable to Slade, probably a bit more. Speed is at least SpiderMan level.
He's considered to be the greatest martial artist known other than Storm Shadow.
He's pretty badass.
The tank flipping was a one time thing, he probably is just a few hundred pounds over peak human.