So I have plans in the future for a few new ant designs - some better than the others and some just a bit silly. My first design that popped into my noggin in the shower was a block of tpu 64d with 6mm walls and forks sticking out from every face, and a directional and self right bar on top (like shell spinners). This would be fairly indestructible and would use a malenki due to weight and foam crammed into the chassis. Basically a mad max wedge.
Second was this weird overhead spinner with the body coated with sanding paper and a big blade on top, less explanatory and a bit simple.
I also had ideas for a horizontal hammersaw (sweeping the hammer across the front) and and a cluster bot with one bot inside of the other.
If these are a good idea give me a nod but if they are absolute crap than you can just say so.
Always want to encourage people building what designs light a fire in their brain and make them happy. Aside from making sure things are rule/safety compliant I feel you should always go with your gut as it’s more fun that way.
We’ve had 12mm stainless steel and aluminium monocoque chassis in ants before, the desire to be a brick has always been there.
Thick TPU is going to be very resilient, and a circular design would be very novel. I think you would still fall foul of other people with forks as sod’s law - they’ll find a gap or have a longer fork and get you. Worth exploring for sure.
I think you need to expand on your ideas a little. I don’t quite understand what the sandpaper is supposed to do and what the benefit to having clusters that Russian doll inside each other?
Horizontal hammersaw is pretty cool, remember then you’re not captivating your opponent between the floor (immovable) and your weapon if you’re swinging horizontally so it would probably do some healthy pushing away vs the pure damage of a vertically swung hammer saw. A pair of them could be pretty good to be fair!
I think it’s worth designing or at least sketching these things out. You quickly find if you still like them once you have had to problem solve and see the (virtual) reality of how the robot goes together.
Just a bit of fun, your gut is always the fun bit 
sandpaper is just a bit of a joke, cluster is also a bit but if the main bot gets destroyed then maybe the other one can do its thing (probably won’t work btw)
I’ve actually also had the idea of a horizontal hammersaw. Basically a thagomizer style bot which swings an weaponarm instead of turning to hit. But thats difficult to build as an ant because of the size and weightlimits.
@MarkR has made one it was super cool! Post pics Mark!
This is Zenith, which is my 150g horizontal-spinner-mounted-on-another-horizontal-spinner.
The robot is in two independent parts. The lower part is a driving chassis with 1S battery, Malenki and 4 tiny Aliexpress 6mm gear motors. It has a bevel gear incorporated into the chassis, the gubbins is accessed from the bottom.
In the centre there is a 5mm carbon fibre rod, which has a pair of wires going up to the removable link (red thing at top) which switches the power for the chassis.
The top part is a structural PCB, with various 3d printed bits and a pair of thrust bearings to make it rotate smoothly. The grey box contains a 2S pack (actually 2x 1S cells wired in series) and a power switch. There is a fs2a receiver, N10 to drive the arm around , which drives a 2nd bevel gear.
The power then goes through tracks in the structural (not just structural) PCB into the brushless ESC you can see, and drives a tiny 1104 brushless motor mounted on the underneath of the arm (like an undercutter)
The yellow thing points in the direction of the chassis, because it’s difficult to tell otherwise when it’s spinning.
It has been out twice, in 2023, and not won a single fight. although I did get “most original” at the AWS in Gloucester.
I could redesign it now to be much better, as its design was significantly hobbled by the (then current) 4 inch cube rule. It is significantly underweight.
Lovely build mark, also never knew anyone had the same little idea (I’m not aloneeee!)
Wasn’t Team Panic’s dual saw thingy technically a horizontal hammersaw (but with two hammersaw-y bits)? Or maybe even a horizontal hammersaw undercutter hugging dual saw bot? (long names society foreshadowing)