[Micah]

Yup, just don't give them to anyone that's got the 10% bonus paths, and try to keep your dwarven hammers out of the hands of anyone that's marked. The chance of an attack is very low, plus basic master smiths are cheap and plentiful, and research-wise one lantern = 1 smith, so after 15 turns you've saved enough money on upkeep to buy a replacement if the old smith gets killed by a horror. You're out a couple of gems of course, but 2 fire gems is pretty small change, and the odds of getting killed off after 15 turns are vanishingly small.