Since I see you have a lot of questions, use the questions section to ask them there please.
If you keep it active yes, it will continue blinding the opponent but while keeping it active you can't mold chakra for other techniques. Wind technique to blow it away yes. I think you can since due to the rank advantage but here is an example to clear it up when yo can't do it: If your opponent rises an plateau of earth and you want to make a dragon of it, you can't due to the chakra in the plateau. Once the plateau stops you can manipulate the earth. Same principle applies here. Though I believe you can do it in this case since this technique is a rank higher than the Hidden Mist, so yes you can use it.
Yes you can do use the Rain Tiger at Will technique to find them.
(Suiton: Mizu No Tatsumaki) - Water Style: Water Tornado
Rank: C
Type: Attack
Range: Short-Mid
Chakra cost: 15
Damage Points: 30
Descripton: The user will wave the Ram β Horse β Bird hand seals and utilize water to create a spinning water vortex around the ninja. The water acts both as a barrier and attack mechanism. The power of the vortex is enough to knock an opponent unconscious.
Note: Can only be performed if there is a water source near by.
After doing 3 hand seals you will focus chakra into a water source and create a spinning vortex of water around a target (be it your opponent or yourself). This makes it good for defense and offense.
(Suiton: SuishΕha) - Water Style: Water Shock Wave
Rank: C
Type: Offensive, Supplementary
Range: Short-Mid (Made short range of the user with a med range reach)
Chakra Cost: 15
Damage Points: 30
Descripton: This technique allows the user after claping their hands together to make a spiralling vortex of water out of knowhere. The vortex then proceeds to explode from the top in the form of a wave. The user can also control the direction the wave goes with hand movements.
After clapping your hands you create a spiralling vortex of water out of nowhere. Then the vortex will explode to create a wave which you can control with your hand movements.
(Suiton: Ukojizai no Jutsu) - Water Style: Rain Tiger at Will Technique
Rank: C
Type: Supplementary
Range: Short-Long
Chakra cost: 15
Damage Points: N/A
Description: A perception ninjutsu, allowing one to freely manipulate rain infused with the user's own chakra after waving the Bird β Rat β Ox β Monkey β Rat β Snake hand seals. The rain falls from rain clouds, formed with the users own chakra. During this technique, the falling raindrops are closely linked to the users senses. When the rain is obstructed by a chakra belonging to someone the existence of the target can be detected. The rain will keep on falling until the user uses the seal to cancel it.
After doing 6 handseals you create rain which falls from the sky infused with your chakra. This allows you to sense any chakra the rain touches helping you detect opponents.
If you keep it active yes, it will continue blinding the opponent but while keeping it active you can't mold chakra for other techniques. Wind technique to blow it away yes. I think you can since due to the rank advantage but here is an example to clear it up when yo can't do it: If your opponent rises an plateau of earth and you want to make a dragon of it, you can't due to the chakra in the plateau. Once the plateau stops you can manipulate the earth. Same principle applies here. Though I believe you can do it in this case since this technique is a rank higher than the Hidden Mist, so yes you can use it.
Yes you can do use the Rain Tiger at Will technique to find them.
(Suiton: Mizu No Tatsumaki) - Water Style: Water Tornado
Rank: C
Type: Attack
Range: Short-Mid
Chakra cost: 15
Damage Points: 30
Descripton: The user will wave the Ram β Horse β Bird hand seals and utilize water to create a spinning water vortex around the ninja. The water acts both as a barrier and attack mechanism. The power of the vortex is enough to knock an opponent unconscious.
Note: Can only be performed if there is a water source near by.
After doing 3 hand seals you will focus chakra into a water source and create a spinning vortex of water around a target (be it your opponent or yourself). This makes it good for defense and offense.
(Suiton: SuishΕha) - Water Style: Water Shock Wave
Rank: C
Type: Offensive, Supplementary
Range: Short-Mid (Made short range of the user with a med range reach)
Chakra Cost: 15
Damage Points: 30
Descripton: This technique allows the user after claping their hands together to make a spiralling vortex of water out of knowhere. The vortex then proceeds to explode from the top in the form of a wave. The user can also control the direction the wave goes with hand movements.
After clapping your hands you create a spiralling vortex of water out of nowhere. Then the vortex will explode to create a wave which you can control with your hand movements.
(Suiton: Ukojizai no Jutsu) - Water Style: Rain Tiger at Will Technique
Rank: C
Type: Supplementary
Range: Short-Long
Chakra cost: 15
Damage Points: N/A
Description: A perception ninjutsu, allowing one to freely manipulate rain infused with the user's own chakra after waving the Bird β Rat β Ox β Monkey β Rat β Snake hand seals. The rain falls from rain clouds, formed with the users own chakra. During this technique, the falling raindrops are closely linked to the users senses. When the rain is obstructed by a chakra belonging to someone the existence of the target can be detected. The rain will keep on falling until the user uses the seal to cancel it.
After doing 6 handseals you create rain which falls from the sky infused with your chakra. This allows you to sense any chakra the rain touches helping you detect opponents.