I PREFER Pence to quickly invoke 25A...because it's immediate and cuts off Trump's pardon power as a hard stop. The time it would take for Trump to get it to a vote by both Houses would take more than the 12 1/2 days he has left.
4. Whenever the Vice President and a majority of either the principal officers of the executive departments or of such other body as Congress may by law provide, transmit to the President pro tempore of the Senate and the Speaker of the House of Representatives their written declaration that the President is unable to discharge the powers and duties of his office, the Vice President shall immediately assume the powers and duties of the office as Acting President.
So, it IS a hard stop to Trump's power. Here's where the timing comes in:
Thereafter, when the President transmits to the President pro tempore of the Senate and the Speaker of the House of Representatives his written declaration that no inability exists, he shall resume the powers and duties of his office UNLESS the Vice President and a majority of either the principal officers of the executive department or of such other body as Congress may by law provide, transmit within four days to the President pro tempore of the Senate and the Speaker of the House of Representatives their written declaration that the President is unable to discharge the powers and duties of his office.
So the VP & the cabinet
can delay for 4 days before sending their rebuttal of the President.
That leaves 8 days.
Thereupon Congress shall decide the issue, assembling within forty eight hours for that purpose if not in session. If the Congress, within twenty one days after receipt of the latter written declaration, or, if Congress is not in session, within twenty one days after Congress is required to assemble, determines by two thirds vote of both Houses that the President is unable to discharge the powers and duties of his office, the Vice President shall continue to discharge the same as Acting President; otherwise, the President shall resume the powers and duties of his office.
So...Pence and Congress can run out the clock because they have
21 days to vote, and since 8 days after the first deadline, Biden will be inaugurated, and both Trump and Pence will be out of office.
"Even if the bee could explain to the fly why pollen is better than shit, the fly could never understand."