Tom Rogic hasn't shown enough of his true class for Celtic this season - but was full of acclaim for the magic he produced against St Mirren in a 4-0 thumping.The Wizard of Oz was back to his best as he slalomed and weaved his way through challenges in the midfield and scored a fine opening goal as the Hoops gained a measure of revenge for their defeat to the Buddies at Parkhead last month.And Collins, who worked with the star for two years when he was assistant to Ronny Deila, reckons the maverick looked like he has his hunger back.He told Sky Sports: "I think from kick-off, he looked sharp, he looked like he wanted the ball and had a good appetite."He looked a threat.