Amorim does not need to target the top 5/6 positions, because as long as he can fix the chaos that Erik Ten Hag did, Amorim will definitely get full support from the club. So Amorim current task is to focus on trying to stabilize and restore the confidence of his players that has long been buried by Ten Hag. Give players comfort, establish good relationships with coaches not only on the field but also off the field to show a sense of togetherness.
Even if it is not a must to finish in the top 5/6, Amorim needs to improve Man United position in EPL standings. Man United is in 13th place, it is not a proper position for a big team like Man United. The club management must expect a better position, they must ask Amorim to return Man United into the top 10 soon. However, it is surely not easy, Amorim should fix the problems in Man United squad first. Improving the players' confidence, applying a better tactic, and making a good relationship among the players are some basic matters that Amorim need to take a serious attention. This may take time but I'm sure Amorim can do it well. He has proven his capability in Sporting, he should do the same way in Man United.