Whether it is Wallace, Davis or even Perk; none of them are going to be able to guard Beasley driving. They all will have to play off him. Let him have the jumpshot. (challenge the shot of course, but not really be in position to block said shot)
With Wallace, that lob pass will still be there. While it will not longer be a ally-opp, it will create an easy shot or foul from behind.
With Davis, the lob pass will not work as well.