I haven't had time to read all your responses, but I just want to point out I was playing Entomb in the Punishing Fires version of the deck.

Entomb was pretty solid. It allowed me to go for Ring, Grove, Fires, Stronghold, Loam, Worm Harvest etc. Now with Revival being playable, a 1-2 of Entomb might not be terrible, especially now that MM is out of the format.

-Matt