In the old city of Toronto, possibly University-Rosedale. CPC got 20% in the last election. In most of the old City ridings, their problem is that the NDP will probably capture more of the disgruntled previous Liberal voters. Toronto Centre, Davenport, Parkdale-High Park, Spadina-Fort York and Toronto-Danforth will probably all be NDP. Nathanial Erskine-Smith is personally popular and can probably hold Beaches-East York, but even that will be a struggle for him. But that would go NDP if he doesn't win.
In Etobicoke, Scarborough, and North York it will be happy hunting for CPC candidates.