Impeaching without conviction won't do jack. We need 67 senators to convict. I honestly don't know what it would take for that many rep senators to vote to convict.
The Senate shall have the sole Power to try all Impeachments. ... And no Person shall be convicted without the Concurrence of two thirds of the Members present.
I sort of thought success was implied in my comment about using impeachment to eliminate the current 3 highest people in the order of succession.