The 23-year-old, who played 40 times for the Brewers in the 2009/10 season , has only conceded one goal from open play in 2013 for the Grecians and put in a string of solid displays.
And centre-back Coles says the former Birmingham shot-stopper, who will undergo a late fitness test ahead of kick-off, is full of confidence ahead of the clash with their promotion rivals.
"He has been upping his game recently," he told Press Association Sport. "His kicking is a lot better and he is doing well at the moment.
"I think with Artur it is a confidence thing and when he is confident he is a very very good player.
"The more shots we can keep away from the goal gives him less to do as well. His confidence in us will be building as well which is also good."
Krysiak has played 88 times for Paul Tisdale's men since joining in the summer of 2010.
- Sports & Recreation