God - shield - whether graveyard helps over boneyard
Chaos Lord – dissipation shield – yes
Dark Matter – no shield – yes
Decay – improved dusk – yes
Destiny – no shield – yes
Divine Glory – no shield – yes
Dream Catcher – no shield – yes
Elidnis – jade shield – no
Eternal Phoenix – no shield – yes
Ferox – jade shield – no
Fire Queen – no shield – yes
Gemini – phase shield – yes
Graviton – gravity shield – yes
Hermes – fire buckler – yes
Incarnate – bone wall – yes
Miracle – solar buckler, jade shield – yes if solar, no if jade
Morte – bone wall – yes
Neptune – permafrost shield – no
Obliterator – diamond shield – no
Octane – fire buckler – yes
Osiris – turtle shield – yes
Paradox – mirror shield – yes
Rainbow – no shield – yes
Scorpio – permafrost shield – no
Seism – diamond shield – no
Total yes: 17
Total no (counting Miracle): 7
And then Scorpio and Neptune's shields can be destroyed, while many gods won't draw their shields for a while. Ferox has 2 jade shields in a 102 card deck, giving a 2/51 chance to draw one assuming two cards each turn. Overall, the advantage outweighs the disadvantage.
Two death quanta isn't likely to make or break the game.
any cost reduction can and will make or break the game
I don't disagree, the two difference between upped and unupped bone wall can easily make or break the game.
While it's possible for the difference between upped and unupped graveyard to, it's not likely. If you need the quanta for bone wall to survive, keep the graveyard in hand for an extra turn or two. With no feral bonds, the skeletons wouldn't directly help survival.