what the hell are you talking about?
they are 2 totally different types of killers. one likes to play games with people, the other likes to eat people.
there is nothing similar about them. its like trying to teach a shitty band how to play good music. it just doesnt work.
and even if they somehow collaborated, what would be the point? is Lecter going to eat some poisoned body? is Lecter going to throw someone in a game and have Amanda eat the person? exactly what "tricks" could Lecter teach Amanda and vice-versa. i mean seriously, the games she/he puts the people in are already f*cked up enough as it is. what is Lecter going to do? play with their head while they are on a 60 second time limit til' there torso rips in half? or is Amanda going to put someone in a game and have Lecter eat them. like he totally couldnt do that on his own.