[Nuggie]

Shits kind of ridiculous. High level spells work well on low MR mobs. On high MR mobs you use what you can. Can't afford to waste mana.

I played a paladin on live. A mentor of mine told me to never use pacify. Always use calm. It doesn't cost as much mana and lasts for same duration. Kind of the same thing here. Higher doesn't always mean better. You have to find the right tool for the job when you're doing things on the edge of your capabilities.

I live by the motto: If I ain't dieing, I ain't trying.

Keep playing with it, you will get a rhythm eventually.