Quote Originally Posted by Monk View Post
It's the highest renegade/paragon check in the game, the paragon check is a little lower than the renegade check so if you're playing through as renegade you may wanna save recruiting legion until the last possible chance.

If you can't secure both of their loyalties in the crisis moment then another option comes in supporting Tali and then talking to Legion afterward. Legion will be angry (well as angry as Geth can be) but you can lie to him and tell him you only supported Tali for the sake of the mission. Legion will understand and his loyalty will be restored.
But does that require a high paragon/renegade level? If so, Im going to side with Legion. Tali is useless and I enjoy seeing Legion do the Robot.