[@Vongola_Hasayo]

It isn't so much that he has to have a picture of the location in his head, he has to have knowledge of it. If someone asks him to make a Rift in Middleofnowheresville and shows him a picture of it that won't really help him so much as if they showed him where the obscure village is on a map. The things he needs to know primarily are direction and distance, though if he has a good picture of it in his head then he can make the Rift more accurate in its placement. So in the example of World Sinking Eruption he would've learned that one through practice, by sending Rifts deep underground and eventually learning that at some point it'll start spewing magma. This was more to explain better how Rifts work than justify the spell, because I'm fine getting rid of it for him to learn at a more appropriate time in the IC. Same with World Crushing Cataclysm.

While I didn't intend for there to be any particular range limitations I didn't consider stress/focus limitations. I'll edit some in when I get to fixing the sheet within the next couple of hours.