A SIMPLE SPELL

This mod adds a cheap new Illusion spell named Combat Assessment to the game, purchasable anywhere novice-level Illusion spells are sold.  When cast upon a target, it will give you some idea of that target's level relative to your own.  For those looking for that sort of information, this spell is more immersive than using the console.

Here is the feedback generated by the spell:

Target is 5 or more levels below you: "You should manage this target easily."
Target is 4 or fewer levels below you: "This target looks slightly weaker than you."
Target is the same level as you: "This target is an even match for you."
Target is 4 or fewer levels above you: "This target looks slightly stronger than you."
Target is 5 to 9 levels above you: "This target seems considerably more powerful than you."
Target is 10+ levels above you: "This target seems vastly more powerful than you."

The spell will also give you a sense of the target's hostility toward you.