Personally, I would rather have it shorter duration and higher damage. My reasoning for this is that it is sort of defense skill, really becoming useful when the enemy is right on top of the Mage. It is more useful if it has a higher dmg output, and I would really only need it for that scenario only, or to help someone else who is under attack.On a side note is cloak of fire a bit useless? If so how can we improve it. Would it be better to have a much longer duration so it's a small handy bonus that you can cast and forget for a while. Or would it be better to have it shorter but doing more damage
Just my opinion.