Keep a hand with a cheap body and a way to protect it. A hand of interaction with nothing to defend cannot start.
Riftbound opens on four cards. What this deck needs from them is one body it can play early and, ideally, one card that makes that body hard to remove.
Keep: any hand with or a two-Energy body.
Keep: a hand with a body and , even with no other action.
Ship: interaction only, however good it looks. and do nothing to an empty board.