There are two separate issues here, let me just outline what I have a problem with.

Khan just melted 60 feet of stonework almost instantly with one spell, the distinction between non-existent and just sufficient stonework to support Judgement's weight even factoring in his fairly low-key jump is so close together when you consider the strength of a stone-floor that it's basically a non-factor. Think about it, when have you heard of someone falling through a stone floor? Therefore, that section of floor is for all intents and purposes destroyed, in a second, with one spell.

This ability is highly convenient to the unfolding situation, but I don't believe Khan effectively described what his spell was capable of doing. Ultimately your CS is a tool to say what you -can- do, but if you don't say in IC what your spell -is- doing then it's considered null. I shouldn't need to be able to see your CS to infer the effects of your abilities, that's bad T1 writing. 

Sooo

1. Spell too stronk.
2. Spell not described properly, highly convenient situation unfolds.

If Khan is allowed an ability that strong, Judgement must be scaled appropriately, in which case a revision of the non-existant damage DJ took from the Knee strike is required, to factor in his character subsequently having their armour shattered and pummelled into their body and being launched either into the stone wall or out the window, as Judgement gains insanely supernatural strength. Considering the scenario I'm fairly certain -I- could have launched DJ as far as his character went with a knee strike, so my character whose strength is probably up to thirty times mine, and his weight which is more than double my own, should result in DJ's character being thrown at least fifty feet.