A way I feel that you could fix the gods and god shields
First if you returned the god damage to full instant kill of objects, npcs or players upon contact with the avatars body. This would help with server cleaning or trolls that spam foundation blocks or huge walls and give the fun back to the gods of which a lot of people started playing the game for the avatars. Then to prevent god coin duplication or exploits and god spamming a 30min coin crafting timer, with a clan summoning avatar cool down, to require a set amount of time to pass before any clan member can summon another avatar or require more than 1 summoner to call it forth, depending on the number of clan mates online.
Second The god shield should block only god attacks, and the instant kill part of the inner shield should be increased to the outer shields current distance. This would instant kill a god that touches the outer shell. Also would not cripple your own army, by allowing all projectile types to pass through the shield, arrows, orbs, treb boulders and demon fire barrage, explosives throwing weapons etc. This will allow the shield to be used for it’s purpose anti avatar. This will give people a reason to protect there most sacred building, their GOD alter. The shield crafting summoning should take the same time as the avatar crafting. 30mins but the shield, sense it would only effect a god attack should last much longer like 7 days, or permanently with a much higher cost to craft.