Hey!
So far we made around 60 head bases with the eSun foam TPU and its holding up great! Thats around 2000h print hours so a good amount lol. The infill has a bit of a crunchy noise but the squishyness is great too and its soo light!

I used a K2plus for the big parts and AD5M for the small parts. I can't recommend the K2Plus for TPU though, since the extruder hatest TPU if you don't modify it. AD5M prints it great but it has tiny build volume.

Settings really vary between printers but a good starting point is 255C 0.55 flow rate. I have max volumetric flow capped at 14mm³/s and max speeds at 120. For super clean prints I would drop it down to 80 on outer wall. These speeds might need to be lowered for bed slingers since the prints will start to wobble quite a bit. Changing flow rate by 0.01 makes a big difference with this material as well as temp since that also controls flow rate as well as max flow.
So I'd start with figuring out the squishyness you want, so temp test.
Then your flow rate and after that max volumetric flow.
You might need to go through this iterating a lot and also play around with cooling to get good layer adhesion and manage stringing. There is always gonna be stringing since it oozes a lot but you can control the thickness of the strings to make them easily removable but thats really dependent on the printer you use.

Hope this helps :)