The constitutional option (also called the nuclear option) ultimately only requires 51 votes on the floor of the Senate to break the filibustering of judicial nominees.
We can lose five RINO votes and still break the judicial filibuster.
This is what the Dims are facing if they invoke a filibuster. 51 votes (including VP Cheney, if needed) and they lose the filibuster hammer from now on (until they figure out a way to change it back should they ever be in the majority again).