It depends how your striker is set up, for example, if he's a target man, you could have wingers supplying crosses to him. Another factor is what players you have to fit the roles, if you have wide men with good long shots and finishing, you might want them as inside forwards cutting inside and having long shots, whereas if they have good crossing and pace, the winger role is much more suited to them.
You also want to take your full backs in consideration, if one of them is particularly good at attacking you might want to set him as Wing back - attack and your winger Inside forward - support/attack. If you do this then when your inside forward cuts inside, he will drag the full back with him and your wing back will attack with him by running down the wing, this will 'overload' the full back and put him in two minds, if he went with the inside forward then he will leave the wing back who can whip across in (also good if you have the target man earlier) and if he goes with the full back, then the inside forward is free to take a shot at goal.
An approach i have been thinking of is putting both your AMR and AML as wingers hugging the touchline, as Barcelona have been doing recently with Cuenca and Pedro, this will make the opposition defence play wider as the have to keep close to your wingers, giving your trequartista more room to apply his creativity and make a through ball.
One more thing, if you have your pitch set as narrow or minimum, having wingers as your AML and AMR won't be as good as inside forwards because wide players struggle to make an impact on a narrow pitch, also your trequartista won't be as effective because he won't have as much room than if you had a bigger pitch.
Sorry for the long post but there's just a lot of factors which affect how you set up your AMR and AML and i'd just try and cover the main ones.