O_O you can combine any two jutsu that would make the other stronger.... you could use
(Katon: Goryuka no Jutsu) - Fire Style: Dragon Fireball Jutsu
Rank: B
Type: Offense/Supplementary
Range: Short/Long
Chakra Cost: 20
Damage Points: 40
Description: The user fires several large dragon-shaped fireballs at their opponent. It is able to alter localized weather conditions to the point of making thunder clouds when shot into the air, enabling the user to perform kirin.
Followed by
(Fūton: Shinkū Renpa) – Wind Release: Serial Waves
Rank: S
Type: Attack
Range: Short – Mid
Chakra cost: 40
Damage points: 80
Description: After performing a single hand seal the user then inhales and takes a deep breath and exhales several blades of wind as they move their head around. This technique is capable of exposing Susanno’s bones.
To power the fire up making a high level S rank jutsu...... O_O