The Seasiders face Cardiff City in the Premiership promotion playoff.
Crainey told the Scottish Sun: "Charlie has been brilliant and scored a lot of goals from midfield.
"He gives us a different option and he's so good at breaking forward. The whole team helps him, with Keith Southern and David Vaughan giving him the licence to go forward.
"But we still have a bit of banter about the Old Firm. It's all fun at the end of the day."