We will see where we are once the trade deadline hits but at that point it could very well likely be a matter of"
1. The Yankees have put the AL East out of reach, and
2. The Wild Card spot is basically secured
If that's the case, and since the optimal roster construction for the playoffs is a little bit different than the postseason, things like a depth starter, passable middle relievers or a mediocre lefty bat to play over Tapia (who has been good this month, Biggio could also be that guy) aren't as important. For the playoffs we should look to acquire an elite SP (or one better than Stripling, Berrios and Kikuchi) and a couple of hard throwing relievers. A copy of Baseball for Dummies for Montoyo would help as well. That's basically it. I suppose we could also look to get an elite left-handed bat as well and perhaps send someone like Gurriel the other way.
So while it seems like the regular season Blue Jays have a whole bunch of needs, the playoff Blue Jays don't really have as many.