If still here for saturday he needs to revert to a back 3 with that 3 being CBs not makeshift using Aluka & Thomas & not going with the 4 & inverted FB into midfield.
We need stability at the back & quickly so Souttar, Kanga, O'Hora need to come in, settle & understand each other.
He had his best spell at Swansea playing a back 3/5 & he reverted to it with Southampton also when they started to leak goals which looked to derail the promotion season, so he does use it, even he must see something has to change.