Crawlspace?

One of the points of the most recent update was to remove all of the purely defensive cards still left in the deck, as they were in conflict with the spirit of why the deck was built.

I like this new version.

Avatar of Slaughter is another edition of Fumiko's/Grand Melee's ability, and he's a hefty body too, so might be worth considering.

Hellrider and Moonveil Dragon, once you get them, probably merit consideration as well.

Why Starstorm instead of Comet Storm? The latter seems more versatile, though Starstorm costs less to do a board wipe, I suppose.

The Avatar is a good call. One big reason I didn't think about him is because I haven't gone back and torn down / rebuilt the non-Mimeoplasm Commander Precons.

Don't worry, HELLRIDER and the Dragon are already under consideration. I'll add them to the Maybeboard to make that clear.

The #1 reason Starstorm is here is because my only copy of Comet Storm was already in my Scion deck, but I might think about switching them.

Makes sense. I don't like to share cards between decks either, gets messy that way. (I've also forgotten that I borrowed a couple cards out of a deck and played with a 98-card deck once. Not really a big deal, but on principle a problem.)

Though, Comet Storm's never gotten much love, it's got to be a dollar rare by now, right? Especially since it was printed in the Commander sets. You can probably find one pretty cheap. (Hell, I think I have an extra, I'd trade it to you if you want.)

Something else occurred to me. Loxodon Warhammer? I know it makes people groan, but imagine all that juicy lifelink on your high-power creatures, to say nothing of the trample.

Huh. I have all the Commander decks, but forgot Comet Storm was included. Like I said, I haven't really paid attention to the non-Mimeoplasm ones in a while. Also, because I don't play very often anymore, I try to build out of what I have, and I only go shopping or trading if I'm looking for something I really want and can't find a substitute for it.

Apparently, in response to your suggestion, the Warhammer went back in time and inserted itself into the very first build of the deck.

Great Scott! It's got a flux capacitor!

perhaps things like Hellkite Charger, World at War, Savage Beating (a personal favorite of mine), etc?

All my copies of Savage Beating are busy right now, but World at War and similar friends almost made it into this last revision. I'll put them back in the Maybeboard and think about it some more.