I don't think Deontay Wilder should spar with David Haye because Haye is a potential future opponent for Wilder and Wilder shouldn't want Haye to get too familiar with him ,i think he should be a scout for the Arreola/Mitchell fight.
He should scout arreola v Mitchell instead of sparring haye. Wilder doesn't want to get sparked out by haye in sparring.
Just fight someone who can fight back.
Seriously, he should go for anyone who is in the lower half of the top-10.
Should he scout the Arreola/ Mitchell fight or should he be Haye's chief sparring partner for Tyson Fury?
http://m.ringtv.craveonline.com/blog/180191-lems-latest-haye-may-train-with-wilder-for-fury-fight