This is where the 6.7-13mm really shines -- when it's big -- you need wide -- really wide.
I will say this though - wide will kick your ass. And the funny thing is - it gets kicked in Post - never when you on site. For some reason, everything always looks good in frame - never does it look like trash until you get it up on screen. And then it is a palm to the forehead moment.
Bam -- that is when you see the wide angle skew. The safe zone is always when you are 90 Deg. to the subject - always.