There isn't rank d as for you need concentration
Name:Genso contol/neonete
Rank:c
Type:ninjutsu
Element:n/a
Clan:Genso konchū
Description: The user is able to use insects of the clan thru a lot of contol and emotions with the insects.He can bearly do any thing like healing scrahes,blocking small nodes of chakra,cause small fires and burns,can shock the opponet,and other stuff depending on the user elements.
Name:Genso contol/medium
Rank:b
Type:ninjutsu
Element:n/a
Clan:Genso konchū
Description: The user can do bigger stuff but not much they still need concentartion but not much as rank c he can't still control using both elemts.
Name:Genso contol/expert
Rank:a
Type:ninjutsu
Element:n/a
Clan:Genso konchū
Description: The user can combine insects elements and use other stuff.
Name:Genso contol/god
Rank:s
Type:ninjutsu
Element:n/a
Clan:Genso konchū
Description:The user can make the insects do whatever the user wants he can even use normal insects one stepback is that he can only contol the ones of his elements.