Are 'trick' spells viable?

[Nerfix]

Some of them are more precise though, and that's nice.

But yeah, I don't know if 'nice' is enough. I've seen a Knight charge get foiled by Rage spam, but there could have been better ways to spend the research. Maybe.

Some of them like Suplhur Haze and Freezing Mists have path requirements that aren't very easy to meet, too.

Blind spam is kinda diffrent, but the range is very short.