I can't see top four being even a remote possibility with the attacking wide forwards, made a thread about it already but I think the best position for United is 6th unless there's wide players acquired.
I can see Erik reverting back to a double pivot, which coincidentally was the key change against Newcastle, Brighton and City that won those games with more balance across the middle. So by abandoning the the two 8's that failed to materialize the entire season, it puts more emphasis on the wide players either coming inside and scoring or providing service into the box.
Hojlund has one of the highest conversions in the league because he wasn't getting service, I don't see that changing next season. Zirkzee can perhaps drop into spaces more playing between the lines but I think the writing is on the wall with this attack next season, it will be the third consecutive season in a row where United have the worst scoring record in the top 8.