Strong points
- First of course is its compact form making it an easily hidden attack especially if you are like me and have long sleeves * demonstrates how easily his hands can be hidden beneath his sleeves* letting you surprise someone from close range and send them flying backwards and if in a normal fight those few seconds in the air and winded and confused and quickly lead to death or defeat.
- Another hidden potential would be its recoil, just like low rank earth pillars or wind stream it could be used for a quick burst of movement to avoid an attack
- And of course the main advantage, its a bullet type attack meaning its very fast, very small and has the ability to hurt a lot if in the right area. And its low rank means once mastered its easily used multiple times so if the first one is blocked or dodged its little effort to fire another one shortly after.
Weak points
- Its biggest weakness is of course its low rank and weakness to earth meaning any earth based defense can block it. low ranks of every other element can also cancel out/over power it besides D rank fire so if they are quick with elements or even ninjutsu it can be very hard to get a solid hit in with this.
- The short range of the "bullet" makes it only helpful (attack wise) in very short range and at that point their are a lot more options then a low rank water ball even with its helpful side effects in the case it does hit or you need the recoil from it.
- Finally their is also the fact that every time you use it you move back a little unless you have an increased weight jutsu active or have bound yourself to the ground with chakra etc. a way to stay still is needed if you want to avoid recoil.
Combinations-strategies
Well I already stated you could hide one under your clothing for a sneak attack, if the ball hits it will leave them in a vulnerable state for say, another Rain technique from above, an earth technique from behind or a follow up attack that keeps them disoriented. A follow up speed boost to get back into short would give you the upper hand as they are reeling from the blunt force from the compressed sphere they would be off balance and thus react to a fast Taijutsu attack much slower.
An easier/lazier method would be shoot the rain bullet and follow up with a nagashi, if they block it they are soaked and take more of a shock and the most common method of blocking Water/Rain is Earth which will be useless against nagashi unless they for some reason use Forbidden rank earth to block a D rank ball of water.
Ways to counter this technique
D rank elements besides Fire, one of my first thoughts would be Wind Blade, its a much higher rank, needs no seals and can be used very quickly and if in short range you just do a simple arm movement and you are cutting through their attack and into their hand giving you a huge advantage as they are a limb down, in a lot of pain if not dead and in short range of you.
As long feng finishes his telling of the technique he takes a breath and releases chakra from his right palm to draw in rain drops from around him, slowly gathering his water source until it covers his hand. After gathered he releases wind chakra to coat it and uses the wind coating to shape the water into the smallest orb he can manage. Once he feels he has it to its bare minimum size long feng takes a steady stance typical of Earth masters, digging his heels into the dirt/mud he thrusts his palm forward sending the bullet flying at a nearby training dummy used for kenjutsu practice and blows its fragile head off.
Long Feng is knocked back a short distance despite his solid stance but he maintains the stance as he slides back. He then looks to his fellow student and Sensei for notes on his performance.