@gpetropoulos I'm using an inductive NPN sensor LJ12A3-4-Z/BX. Sort what you already got and I must say connecting and using it is EZ PZ, as long you don't use magnets. There is a comparison table in the Duet3D docs posted above.
In my case I simply took the best probe with the shortest setup instructions:
https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_Overview
I then broke the bank on an overpowered, really good 24V power supply so that the voltage is stable and it worked perfectly ever since.
Is there any reason you can't use an adhesive for the silicone heater? The heater runs inefficiently without full contact due to air gaps.