Both ligh flame at the bottom remoska top on to get the heat from below and above critical with yorkies lol
Now that's a trick I never thought of. But would be concerned about the lid over heating if both running at the same time. The base is just a rather thin aluminium pot with basic non-stick coating, sure I use it on the hob to e.g. finish off the gravy, but I have much better ones too where I don't have worry too much about melting them or burning the basic non-stick. It is what it is, and very good at that. But I might give it a try.
I have a small "batterie de cuisine" for the van which all stacks nicely together, including a pressure cooker (must have), mostly Tefal Ingenio, but at home I have different stuff, mostly solid copper or cast iron, with some good stainless steel stuff, gas and induction for me at home And a very decent fan oven. Oh, and an Aga that was in the house already, but that is also very different and only turned on in the winter or for special occasions. It is an energy monster. The remoska does have it's place in the setup and is altogether very good. I would never have bought one myself, being a bit sniffy about such things, but a relative gifted it to me, she knows a bit about these things, It was a great birthday present, and I have completely changed my views since owning it and learning it's ways. Along with the Cadac, which I chose for myself.
The remoska doesn't get used at home much except for practice, but that's just me, I would not feel in hardship with just two burners plus one, perhaps I should use it more.
Now we could digress onto decent knives, about which I have some opinionated views also, basically you get what you pay for, but also need to know a little bit about how to look after them. Most just don't care or even understand, but are thankful to me when I visit and can't resist sharpening them up again for them.