Considering the bulk of the final Chimera, perhaps if a Catapult were added somewhere...
Well, the Catapult adds a lot of instability to the deck, and is almost useless. The only case it see it useful is when facing a lobotomizer and a phase shield:
-the lobotomizer lobotomize your Chimera.
-you cannot deal damage through the Phase Shield.
for the rest of the cases, a simple Chimera will do the trick.
I also found useful the addition of a SoPatience. You can delay your scarabs until you can produce a OTK (your chimera can always use a turn of momentum).
It also helps against SoSe or Phase Shields (if you don't want to merge all your scarabs into a Chimera).