A true belly landing is very survivable if done on smooth surface and wings level.

If one gear won't come down, you want it to be the nose gear.
That leads to a symmetrical touchdown and slide-out. Also very survivable on smooth surface.

One main gear down is not as good but with underwing engines it's still not too scary. That engine will slide pretty well on pavement though it (the engine) won't be reusable afterwards.

I'd be a LOT more concerned about smoke in the cabin as the outcome of that isn't as much in the pilot's skilled hands.