IMHO, just aswe have not mastered Dark Matter and Energy, the Magic Element could have some influence on keeping a moon orbiting a moon depending on the concentrations of elements in each of the 3 bodies.

This can also be used to "hand wave" numerous other questions and aberrations.

The effects of geothermal energy and solar storms on plant growth, social developments, and warfare questions don't need to be quantified to a rigid scale since it was vastly different in our world and wasn't heald to a rigid scale; the rainforests should've done more?

IMHO that is. Thank you.