A rock and a hard place
To comment on Flying wrench position. It's like being between a rock and a hard place.
FO's are often put under pressure to operate in border line cases. It is the duty of the FO to advise the Captain and the Company if he is breaking the rules and endangering lives. These books like MEL's and QRH's are in fact written by lawyers who will tear you apart at the board of enquiry for not confronting the captain when he goes against the MEL. Mr. Boeing (the manufacturer) issued a MEL for a reason and it must be adhered to of the Aircraft does not take off. It's that simple.
Some African operators need to catch a wake up with this regard. It's totally unacceptable.
If the push comes to the shove, resign and get another job.