so here is all the combo with a combo of key:
up and down: kick in the air (at the same time)
up and down: roll attack(not at the same time)
left and right:evasive roll(same time)
down and left or right:sliding while standing up(at the same time)
slova it may be childish but it is not luck at all you have to do like if you were the enemy and try to think where he will move use your skill well and other things like that