Determining a mob's level by looking at their damage?

[fastboy21]

When charming on my necro and enchanter in the mid 50s I would always watch the max hit of a new pet and my target...

if the mob can hit for 144 it is usually high enough lvl to summon (which is important to know when charm solo'ing). if the max hit was only 140 or less it wouldn't, even if it was of the same type (spectral knights in KC or bugs at NG, for example).

Not sure what that translates to in exact lvl, but the max hit was def a function of the lvl of the mob and 144 meant it was high enough lvl to summon.