hehe, the spell are very self explainatory.

Twister (all) is some twister.
Shockwave (all) is a shockwave.
Aerial Slash (all) is a extremly strong wind with plenty of debris.
As from how far away he shoot in lava wouldnt really matter. Projectile are always in a form where they can achive fastest speed. Which would mean it wouldnt make the lava go high. when you see some skilled fools jump into a pool there is barely anything that splash. It would create the same kind of effect with lava.