I think Robotnik def tends to design his bots with theatrics in mind, so the spikes can still work for this design.
But yeah, this is fucking sick and I'm def interested in seeing how you end up using these guys in your comic.
I like that you kept that blue-green color for the energy source, too. I think it makes his tech that much more unique as opposed to having the typical blue or red energy or whatever.
But yeah, really great work yet again.