on using Hanzo vs Suija...
you have speed going for you, so you can avoid getting hit by his waterballs by running/rolling under him. Unfortunately, you might have a problem actually hitting him bcause he's able to do a followup attack after he throws out his projectile. The flying head toss thing takes him across the screen away from you (run after him), and the spinning attack forces you to block.
You'll have to be patient and wait for a mistake and avoid getting overly chipped in the meanwhile. Running & rolling under projectiles, playing mindgames with teleports, wall jumping to get height advantage - you'll need all these to try to get your opponent to budge. After a wall jump you can throw shurikens at him to chip HIM for damage instead (don't do this _all_ the time though)
After a while, the suija player will probably try to come at you with his normals intead of raining down projectiles. your df+C has good range, knocks down, and avoids his stand AB. Far B will clip him of he tries to jump. Be wary of cr AB into spinning slash.
Focus on scoring your knockdown (which will most usually come from df+C, run C or mozu otoshi) and then it's high/low/grab mixup time. If you're ahead on life, force a timeout if you have to.
Never, ever do one of your teleport attacks. All Suija has to do is block and hit AB as you bounce off (high version) or as you crouch in front of him, recovering (low version). Free damage for him.