Method 1: Basic Projectiles
Alright these techniques involve creating projectiles like shuriken or kunai. Shuriken and Kunai are examples of projectiles and are not limited to that scope. When you hear and think of projectiles, you think of objects that you launch or project towards your opponent. They're something that leaves your possession and treavels towards your opponent. There is nothing different when it comes to suiton projectiles. All you're doing is launching water at your opponent as you would any other projectile. Now, with water and any other element that uses projectiles you tend to use a lot of shape manipulation. Reason is, is because you need to make the projectiles strong enough damage your opponent (pierce them, knock them back with blunt force, etc). Water or any other element at its base is just raw unformed element. By using shape manipulation you form the shape of the projectile you want. As well, you also compress the element to a degree which allows for a certain density which is always good. With these water projectiles, you will be exhaling them from the mouth. You will first inhale and focus the chakra from your core and channel it up into your lungs and mouth. You will then exhale; the chakra you gathered in your lungs helps propel the water, and the mouth is the point of release. You use shape manipulation to then form the water into whatever shape you need it to be, whether it be a ball or something more advanced like a shark. The water is also compressed in a tight container (the boundaries you create by shaping it) therefore when it makes impact with the target they'll generally receive a blunt impact that knocks them back, has the capability to knock the wind out of them, bruise them, maybe break bones or damage the organs and cause shock. Also, if fast enough and small enough, the density from the tightly compressed nature and the speed may be able to pierce like a bullet. Using other mediums of release for projectiles, you would simply channel your chakra into a different location and then follow the rest of the procedures of releasing the water, and shaping it for the desired effect.
Advantages to Method
Techniques in this category are quick releases, designed to attack in short to long range scenarios against big single targets, with normal movement speed. Just like projectiles, once they leave your hand it frees you up to attack again with more projectiles or even other types of techniques. Techniques in this category allow for you to launch several shots in succession in most cases allowing you to barrage your opponents from several different angles possibly or use them as a distraction or ploy to force them in directions that would be beneficial to you. Large enough projectiles will make it difficult for your opponents to avoid, but not impossible. There can be issues with visibility, allowing you to block your opponent's vision while you plot a sneak attack. However visibility aspect is a double edged sword in most cases. You won't necessarily be able to see them unless you have sensory abilities. These techniques are better used in closer distances to disable both the ability to dodge and counter but also to make full use of the speed of these projectiles. The closer you are, the less time they have to hit the opponent.
Disadvantages to Method
Though quick in release, once projectiles are released you have no control over them. It's generally the same in every case with projectile based weaponry minus attachments like wire that allow you control. However in the case of chakra based projectiles like these, after exhaling exit from the point of release there is no real control over the projectiles. The direction you've launched is where it will go and it could be very easy to avoid them with basic techniques that could move you out of the line of fire, like Earth Release Technique or the popular hurricane fist into the air. There is the problem of the rapid fire projectiles. As said previously, as you're allowed to fire multiple shots from certain techniques, yet they don't all have the power of that particular rank, their collective power combined = the rank of the technique as a whole. What this means is, as you divide the projectiles into several shots, they considerably get weaker allowing for your opponent to exploit the weakness. Some techniques may converge at a single point (usually the target) so that they may not be able to avoid harm by just attacking individual shots, there is still that possibility. Those who try to cover a wider range with more projectiles will leave themselves at a disadvantage. The opponent can protect just their frontal or the area of where they're attacking by using weaker attacks protect against individually weaker fireballs or fire projectiles. Another big disadvantage is this method is that these techniques aren't very prone to combos with other techniques, especially those of other elements. The projectiles are generally so compressed and dense that they explode on contact, preventing them from melting or heating earth that could be used in a combo with them. The sheer concept of a projectile makes it less prone to be comboed with wind or lightning as the projectiles would require insane precision to be comboed with a wind or lightning technique. Projectiles aren't also very usable with water for the same reason as earth as the projectiles would simply "rupture" and not deliver its effect due to the small time in contact with the combo technique. The main disadvantages are that projectiles are fast yes, but less versatile in combat and for the most part, easy to defend (Credit to Scorps)