Economics of dwarven magic

[hcobb]

The Light spell does no good as a grow light as it would take around a hundred of these per hex and each apprentice can only power 25 per day. Even if you rotate these around that's still two wizards per hex of agriculture.

Meal includes (non alcoholic?) drink, but do you subject the waste products to a Scour or grow mushrooms?

Does the water from a Magic Rainstorm stay around after the spell lapses?

Will combining Scrying (or Insubstantiality) and Dark Vision enable the dwarf to see inside rock and determine where to mine? Otherwise use Pathfinder.

Open Tunnel is much quicker than using hand tools, but please ensure that there are no gems or useful ores there first. Does enchanting a pick to increase damage also increase tunneling speed?

BTW: Does anybody else use the rock splinters spell from page 71 to exterminate hundreds of rats or bats at a time?