Fantasy vs. Science Fiction

It's definitely not made of metal or diamonds.

Why is that?:) It's not based on anything.

One fighter will be enough to kill at least a few dragons.

Why?:) How? In the end, you'll only get cooked pilots:)

The fact that a dragon's scales reflect energy is completely unfounded and far-fetched, just to make dragons super-powerful and invulnerable again.

It's actually based on something. It reflects magical energy. If it reflects magical energy, then a pathetic bunch of simple protons won't be a hindrance to it.
They are super-powerful and invulnerable:)

Fire elementals.

Arcata dragons.