1. Depends on how hard its raining. A heavy downpour would immobilize someone in seconds. A steady rain could take longer, less than a minute definitely.
2. It's like the last one but slower since it doesn't bring water to the victim. A downpour could take full effect within a turn but any less than that may longer. There's no set amount of speed that's lost.
Ok. Now we move on to B ranks. First of all, use your chakra to pull down and condense a portion of the rainclouds above to form a clone of yourself from it. However, it's won't be a perfect copy. While it should have the same shape and color as you, the clone still looks like shifting clouds. Despite that, it is solid enough to take and receive attacks. How about a little match?
*sends a Pein to punch your clone when it's created*
(Ame Kumo Bunshin) - Rain Cloud Clone
Rank: B
Type: Supplementary
Range: Short
Chakra cost: 20
Damage Points: N/A
Description: A jutsu that creates a clone from the Rain clouds in the sky. The clone resembles the user but keeps the appearance of moving clouds with only the shape and color of the user. Because of this the clouds cannot be used as a distraction. The clones are able to attack and receive attacks.
Next, perform a string of handseals and imbue the rain with your chakra. Then you should be able to gather rain in the form of several rain bullets. The increased weight of the bullets will make them fall at an faster rate and with the same force as large falling rocks. Go crush his dreams.
*points to a Pein walking happily beneath an umbrella*
(Ame Ame Tama) - Raining Rain Bullets
Rank: B
Type: Attack
Range: Short-Mid
Chakra cost: 20
Damage Points: 40
Description: The user does the necessary handseals and focuses chakra into the rain, the rain draws together and forms several bullets of rain. The "bullets" fall at an accelerated rate and feel like large rocks falling from the sky.
For this one, after forming a string of handseals, simply hold your hands out in front off you and gather a large amount of rain into the form of a solid wall of water connected to your hands. Obviously it can protect you from attacks but only while your hands stay connected to the wall. As a consequence, you'll also be vulnerable to electrical attacks striking the wall. Defend yourself. Katon: Gōryūka no Jutsu!
(Toku no Ame) - Shield of Rain
Rank: B
Type: Supplementary
Range: Short
Chakra cost: 20
Damage Points: N/A
Description: User performs the necessary handseals and places their hands out in front of them. Using chakra they gather up a large amount of rain and create a wall of solid water. The water is dense and difficult to move through, thus protecting the user from most taijutsu attack and fire attacks. Earth based jutsu and Lighting jutsu are highly effective against this technique. The user must keep his hands connected into the wall at all times or the wall will return to its normal state. If struck by electricity it will move through the water and strike the user as well.