Solstafir exhales over three of the Marauders, vaporizing them. It seems despite their increased bite strength, their vitality and fortitude aren't any greater than a standard Marauder, so even on a passed save, they die.
The fourth target of Liselle's Energy Blast Dorje might be able to survive: (1d20+4)[16] DC 15
Though Levi's blast and Alistair's wraith are able to clean up any remnants. The Ethereal Marauder's bodies de-materialize upon being slain, vanishing as quickly as they appeared.
Magical energy begins to gather to the sculpture, though it's not clear what it is doing.
The party may act, though other than maybe the sculpture, there are no obvious threats.