Celtic’s late window search for arrivals proved to be worth the wait as Brendan Rodgers brought in several reinforcements to strengthen his first-team squad. The Bhoys brought in Arne Engels, Auston Trusty, Luke McCowan, and Alex Valle before the deadline, adding to the sweeping optimism surrounding Celtic Park at present. At the start of last week, Celtic pursued Lazio winger Gustav Isaksen on a loan-to-buy basis before swiftly being told he wasn’t for sale during the summer market. Capped once by Denmark, Isaksen joined the Serie A outfit for £10 million from FC Midtjylland last year. Howeve…