Good thinking.Crashing is too risky, UAE should go for the shirt pull. Just physically hold him back at the same time that Almeida attacks so he can't respond and loses time. Have someone ride shoulder to shoulder with him at all times so if he stands up to attack it's easy to reach over and grab his jersey.
In the mountain stages UAE could even have several satellite riders up the road, to take turns pulling Vingegaard's jersey if he attacks.