in fm 12 best assistant manager for me was sidnei lobo - 2 seasons, and then daniele baldini - Luciano Spalletti's former assistant manager at zenith ( I'm at chelsea btw )
valdir de moraes really best man.
my assisten manager (mike phelan)leave out to take blackpool at my 2nd season..
lucky me,valdir was no job,and i got him
For me it would be Dave Watson who is a youth coach at Newcastle, he was fantastic for years! Also Terry McDermott is usually quite good and ive got to add Martin Keown as well he is decent!!