when attacking, does destroying the stonemason reduce it's benefit? Does placing stone mason in protected place make sense?
I can't be sure, but I think this is set at the start of the battle, and doesn't change, no matter what happens to the mason. Even if it did, it's such a low benefit, I wouldn't worry about protecting it. Never seen anyone protect it, either.
Low benefit??? I says pardon? Kel, you just spent 140M upgrading your walls to level 9, an increase of 250HP per wall. Level 2 mason adds 400HP per wall. That makes it over a 200M benefit. Of all the perks, it is by far the most valuable. Kel is right on not needing to protect it though. To my knowledge.