In EggWars, you can normally buy obsidian for 10 gold. This means that in order to encase your egg in obsidian, you have to get 50 gold (which can take a long time). This is okay, because obsidian takes way too long to break without a diamond pickaxe. The problem is that in order to get a diamond pickaxe to break through this stuff, you only need 10 gold (though you can also get a slightly better diamond pickaxe for 10 diamonds). This is a problem, because it makes obsidian pretty much useless.
My suggestion is to make obsidian and all of the types of diamond pickaxes cost diamonds instead of gold. Maybe obsidian would cost 2 diamonds each and the weakest diamond pickaxe would cost 15 to 25 diamonds. This would make defending your egg much more worth it.
This suggestion is mainly oriented towards Solo Mode, and there might be a different situation in Team Mode (I don't play teams as often).
My suggestion is to make obsidian and all of the types of diamond pickaxes cost diamonds instead of gold. Maybe obsidian would cost 2 diamonds each and the weakest diamond pickaxe would cost 15 to 25 diamonds. This would make defending your egg much more worth it.
This suggestion is mainly oriented towards Solo Mode, and there might be a different situation in Team Mode (I don't play teams as often).