If Tycoon is splitting apart debris with his remaining weapon, then Guardian figures that should help clear the way for what he can do next.

The fact that he's used his Signature Ability and that limits how much time he has left in the DreamSphere allows him to put most of his stresses to rest. He's got to protect the others while Chaosbringer saves Mio.

He lifts his arms, holding his staff to try and support the hall as they run.

"Cinnabar, Tycoon! Protect each other and get out! I'll be fine!" He has to believe that he'll make it in time to the waking world. He wants the others to be able to escape before he gets pushed out and becomes unable to support them any further.

Guardian then summons crystal shards and attempts to use them as reinforcements to the base against the rattling room.