From the other thread on the subject, here are some suggestions for new greater vaults.

Greater thunder vault: lighting lizard, air elemental, baby blue dragon, blue dragon, ancient blue dragon, great blue wyrm
Greater cold vault: baby white dragon, frost giant, frost giant berserker, white dragon, ancient white dragon, great white wyrm
Greater acid vault: ankheg/giant slug, baby black dragon, black dragon, ancient black dragon, great black wyrm (alternately: black slayer instead of ankheg)
Greater daemon vault: least daemon, lesser daemon, greater daemon, moloch, greater moloch, balor
Greater chaos vault: chaos eye, chaos viper, corruptor, chaos knight, chaos warlord, black unicorn (other chaos species are options... I chose this set specifically to avoid overlap with D:50 or MT).
Greater lawful vault: blink dog, holy slayer, solar, white unicorn, ki-rin (we really need more lawful monsters...)
Greater giant lord vault: stone giant lord, fire giant king, frost giant berserker, frost giant jarl, titan, greater titan
Greater stone vault: Clay/stone golem, stone giant, wall beast, living wall, earth elemental, stone ooze, greater earth elemental
Greater water vault: shark, giant turtle, water elemental, dragon turtle, greater water elemental, giant dragon turtle (obviously this vault would be entirely underwater!)
Greater minotaur vault: Ancient minotaur, minotaur mazemaster, minotaur mazelord, minotaur lord, minotaur mage, minotaur king
Greater mixed vault: random monsters, boss can be any of the other greater vault bosses, as well as any other high level nasty monsters (greater elementals, dopple kings, etc.) that haven't been hit yet.