But they don't want to make placement on the go easier. They want us to waste time and put some effort into putting down a rune. They want us put a rune down in a perfect position in which we'll able to use it. If we can't do it, then either a) we didn't learn the fight or b) it's not possible on that fight. If the answer is a), we need to learn it and if the answer is b), then we need to use another talent.