What dangers in Senegal, Mali and Burkina Fasso
 

I would like to know if is possible to make the connection Agadir - Dakhla in one day with two Land Rovers Defender.
I´m organizing a trip to Mauritania, Senegal, Guinea-Bissau, Guiné, Mali, Burkina Fasso and again Mauritania.
I would like to know if exists some place where the safety of the caravan can be in danger. What dangers and cares we should have when crossing these countries? Which the most dangerous country?
Thanks
Carlos
Portugal