I'm with vieralynn: everyone in Ivalice is a mage of some sort, albiet maybe a very minor one. People who would have grown up into mages in Thedas are SUPER powerful in Ivalice.

Templar skills should work in Ivalice, but maybe not as effectively because of all the ambient magic?

I can't see darkspawn sensing working with anything but darkspawn, it doesn't work against, say, dragons or wolves or whatever in Thedas.