Dragons vs. Balrogs?

[obloquy]

...the wills of Orcs and Balrogs etc. are part of Melkor's power 'dispersed'. Their spirit is one of hate. But hate is non-coöperative (except under direct fear). Hence the rebellions, mutinies, etc. when Morgoth seems far off. Orcs are beasts and Balrogs corrupted Maiar.

MT

This is a useful quote to support my contention that the power Morgoth put into his servants was to control them, rather than to enhance them.

Here's another one, also from Myths Transformed in an Author's note:

One of the reasons for his self-weakening is that he has given to his 'creatures', Orcs, Balrogs, etc. power of recuperation and multiplication. So that they will gather again without further specific orders. Part of his native creative power has gone out into making an independent evil growth out of his control.

The power he put into them also served to allow them to recuperate and multiply on their own, perpetuating his evil even after he was imprisoned.

And with that I must go, yet again. I shall be back later!