Yeah, these are one of those genjutsus that is pretty useless. I know as a sensei I have to pretend to make every jutsu useful, but I will seriously doubt you ever use this or pull it off, there are better HA and CJs that do this job quicker and one people more consistently. Anyway, let's talk about the next jutsu.
( Genjutsu: Jigoku Gouka ) - Illusion Technique: Hell Fire
Rank: C
Type: Supplementary
Range: Short-Mid
Chakra Cost: 15
Damage Points:N/A
Description: The user casts an illusion where the opponent sees a huge ball of fire descending from the sky and enveloping its target.
This is probably the most generic Genjutsu of the entire list. What do you personally think of this?