Ou results between December 8th (Chippenham at home) and April 20th (Bashley at home) were played 23, won 18, drew 2, lost 3. Not all the performances were top-notch, and many were playing 4-5-1, or a "sort of" 4-4-2 with Billingham pushed up alongside Luke. Mackey only joined in March so I would suggest our improved form was down to more than just him or the formation, though I would have to agree that his presence made a difference - 8 wins from 8 after he joined doesn't lie!
I would say that returning to a settled line-up with players playing in the right positions from early December onwards was more of a factor in our success.
I haven't checked where we were in the table before Mackey joined but I think we were well up there and I certainly don't agree that we wouldn't have made the play-offs without him.