Green Devils need to overcome a first leg deficit against Tranmere Rovers; Reuben Reid doubtful; Gavin Gunning suspended.
Forest Green Rovers were beaten 1-0 in the first leg of their play-off semi-final by Tranmere Rovers at Prenton Park.
Cooper made seven changes to his starting line-up with loanee Lewis Ward recalled between the sticks.
Farrend Rawson, Joseph Mills, Liam Shepherd, Carl Winchester, Reece Brown and Christian Doidge were all handed recalls.
James Montgomery, Udoka Godwin-Malife, Lee Collins, Paul Digby, Lloyd James and Shawn McCoulsky dropped to the bench.
George Williams made a welcome return to the bench after recovering from an ankle injury.
He replaced Reuben Reid, who missed out through injury.
Cooper has no new injury concerns and will check on the fitness of Reuben Reid, who is struggling with a knee injury.
Gavin Gunning's season is now over as he serves the first of a three-match ban.
Forest Green Rovers have won one, drawn one and lost one in the three previous meetings between the two sides at the New Lawn.