I'm guessing it turned into lava as well then right? Since you said the mud partially?
As I'm inside of the mud slide, I use:
Fuuton: Senpuuken (Wind Style: Hurricane Fist)
Type:Attack
Rank: B
Range:Short-Mid
Chakra Cost:20
Damage Points:40
Description: A vortex of wind shot out of the users fist wind he/she punches.
Instead of pushing it directly under me, I push it diagonally forward, towards the ground, pushing me diagonally backwards into the sky (so I'd land near the mud slide when I come down), because wind strengthens fire, that it hits, which, due to it's rank and therefore size, would be at least the one you shot to my left/right, and all of your fireballs would hit the mud slide, more than enough to turn it into lava. When I land, I use:
(Doton: Doryuudan) - Earth Style: Earth Dragon Bomb
Rank: C
Type:Attack
Range:Short-Mid
Chakra cost:15
Damage Points:30
Descripton:The ninja will do the necessary hand seals and create a dragon from the river of mud made after using the Doryuu Taiga technique. This dragon will then spew mud projectiles from its mouth,best when used with Dragon Flame Bullet to turn the mud into lava .
I use this before I leave mid range due to my wind jutsu As the dragon rises from the mud river, he is already coated in lava, allowing him to shoot lava projectiles as well.