Difference between:

[Sage]

Um, no. He meant he figured combat teleportation is too powerful.

It's no big. Just like everything else, you're expected to have a modicum of common sense. Now, it sort of depends on how you play CT. Either you're literally just winking out of existence only to reconstitute yourself back into existence somewhere else or you're tearing yourself apart at the molecular level and moving your components at insane speed before reassembling yourself. Either way would exert a great deal of strain on you.

If you start CT-ing your ass off all over the playing field all the time, you'll tire yourself out.