The Ulster scrum half was given just three minutes to make an impression against England last weekend and did his best to make his mark by touching down a consolation try.
Ahead of tomorrow's 2.15pm kick-off in BT Murrayfield, we are asking you to select the best combined XV from the two starting line-ups in the poll below.
The Former Connacht player says Schmidt's Ireland side are more reserved than the Leinster side the New Zealander coached from 2010-13.
"We talk about continuity but I think it's a fantastic opportunity".
Munster powerhouse Farrell will partner Bundee Aki in midfield, with Robbie Henshaw dropping out of Ireland's match squad due to a dead leg.
Chelsea or Real Madrid? Cesc Fabregas reveals Eden Hazard's decision
Eden Hazard has been the rumour mill's favourite customer ever since he made his debut for Lille. My target is to help the team to win something".
In other changes to the pack, Jack Conan comes in for the injured CJ Stander at No 8, with openside flank Sean O'Brien taking the place of Josh van der Flier, who moves to the bench.
"It does make it hard; the problem is he maybe could have played".
'You've got Chris Farrell sitting in the wings, massively motivated to do his best, ' said Schmidt. So it's a great opportunity to get him in and give him a run.
Toner's ankle injury has exacerbated the absences at lock of Iain Henderson with a finger problem and Tadhg Beirne with knee trouble. "He stepped in once past year and got man of the match and he's a guy who's getting back to form after the long lay-off he had".
This is Schmidt's last Six Nations in charge of Ireland before he stands down after this year's World Cup in Japan.