This is what Russia tried to trigger several times, this almost WW3 like scenario. "We" against "NATO". I'd try to keep the cool. Don't support the "Russia is under threat" narrative. Let them face their inner chaos and power struggles instead. Then the long wait works against them.
Ukraine must be supplied as needed and everybody must be ready for a long war, WW1 style. Whatever Russia comes up with by spring must be met with the right responses.