In this section, we've gone around asking others for insight.  Here are some different observations concerning Mumm-Ra.
But they're unecessary because we were really thorough.

Mumm-Ra is a worthy foe, but is ultimately pretty stupid.--Lion-O

You can get around him if you're invisible.  It's RedEye that you have to watch.--Tygra

I've always wondered what it would be like to actually "look" at him with natural eyes, but after reading the fashion section, I can see how something like that can be turned to Mumm-Ra's advantage.--Lynx-O

He's just an old pile of bones.  I can take him any day.--Panthro

From my experience, he's kind of slow with his energy blasts.  I can usually dodge them.--Pumyra

Don't get close to him.  He's bad news.--Snarfer

Snarf-Ra the Ever-Living had its advantages.--Snarf