For me it's Higgins.
Buono, Austin and Berry are all safe. Pinner's a fixture in TO, and unless he's whacking his QB's while they sleep, their plight really isn't his fault.
But of the rest? I gotta think the Tabbies are progressing under Taffe, and Popp holds every position in the organization.
But the Labour Day home and home will be a test for both Higgins and Danny M. Higgins will need at least a split to save his job, I'd say. If he loses both ends of that, they'll be ready to blow it all up in Cowtown and start over.
Danny Macccccciocccccca will likely get the benefit of a full year, since it was an acknowledged rebuilding time in Edmonton, but if they lose both the Labour Day games, they're really only a crossover team at best, and if Bishop and TO come on strong, a 2nd straight year of no playoffs won't sit easy with the locals. How do you keep a coach who's taken perrenial Western finalists into also-ran status in 2 years, and doesn't seem to think there's a big problem? The Eskimo mystique would suffer a huge blow.
But, as I said at the outset, Higgins is closest to the cliff.