MTG Salvation

Assault Suit prohibits the equipped creature from being sacrificed. Killing Wave says each player has to sacrifice each creature they control or pay X life per creature.

1. If I'm able to flash Killing Wave on an opponent's turn when they've been given control of a creature equipped with Assault Suit will they be forced to pay X life for that creature if X is less than or equal to their life total?

2. If X is greater than their life total does that creature and the player remain since the creature can't be sacrificed and the player can't pay enough life?

On the card's gatherer page:

If you can’t sacrifice a creature (perhaps because of Sigarda, Host of Herons), you can choose not to pay life and nothing will happen.

DOH. Thanks.