I'm testing this variant against FGs and its working wonders.
6u2 6u2 6u2 6u2 6u2 6u3 6u3 6u3 6u3 6u3 6u3 6ve 6ve 6ve 6ve 6ve 74a 74a 7jv 7qa 7qa 7qa 7qa 7qa 7qa 7te 7te 80b 80b 80b 80b 80b
(Edited deck, replaced 1 CP with 1 Imp. Blessing, I'm considering adding another in place of a second CP, I'm also looking at a Rage Potion possibility)
Its amazing, the only major differences between it and the first in the OP are the unstoppables and liquid shadows. Unstoppable is absolutely essential in a scarab charge IMO, all it takes is 1 of them and you can get 40+ damage momentumed if you have some TU left. The liquid shadow is a fantastic addition to the deck, it has saved me from sure death more than once. I'll give an in depth argument for each here:
Unstoppable: 1 gravity to bypass all shields for the one it is used on, and any more you TU from that point on. Yeah, it does take away that oh so essential gravity quanta, but 1 lost devour is an acceptable loss for momentum and +1|+1.
Liquid Shadow: 3 Dark to turn your scarab into a vampire, however it looses its devour ability. On first glance this seems like a terrible card to use on a scarab, however it isn't. Once you have one scarab with 10+ health, it can devour everything until you run out of gravity, having more just speeds up this process by 1-2 turns (seeing as you WILL run out of gravity). However, once you TU that first big scarab, you have the opprotunity to make the new one a vampire (and hopefully with momentum too), at which point you will have 1 scarab for devouring, and one for healing. For each TU that you draw from this point on, you can choose if you want a new vampire, or a new devourer, whichever suits the situation the best.
Here's a funny pic from a lvl5
Bad move using basilisk blood on my scarabs lol
EDIT: Here's another picture showing the true versatility of this deck
I didnt draw a scarab in my first few turns, but he got a fire spirit up to 10|3, so I PUed it, buffed it, momentumed it, grew it twice, vampired it, and finally PUed it 2 more times. 8 turn EM versus Hermes? Get down.