The Shaymen boss has 16 players already on his books as they prepare to return to pre-season training in a few weeks’ time.
Last week they added their first new signing with midfielder Tom Pugh arriving on a two-year deal following his release from National League North side Scunthorpe United.
There may not be a wave of new faces coming in with the manager already boasting good numbers.
He said: “It is a lot less of a rebuild, that was the plan a few years ago to try and secure people on longer-term deals
“We’re seeing the fruits of that long-term planning now. If we were to start the season today we would have a really competitive team and a strong bench.
“I’m delighted that we started to look further into the future. Hopefully we can now build on that work.”
Millington says the club’s ambition is to aim for the top three spots in the division.
“We’ve got a lot of hard work ahead of us in a lot of areas, we are looking to improve,” he said.
“We could be in a position this year of having 90 per cent of our squad in place by the start of pre-season, which would be phenomenal progress.”