I don't want to use parsers

[Cynfael]

I have seen good summoners that were able to hold their own not epically high on the enmity bar but certainly more than 50% there.

If a SMN is high on the enmity list, then either everyone else is using enmity-reduction skills or the SMN massively outgears and outplays them. A solid chunk of the SMN's damage and enmity generation is attributed to their egi.

Also, as far as using the enmity list as a DPS indicator, it actually can be impossible to regain your "spot" after reducing your enmity if the DPS are otherwise closely matched in damage output and uptime.