You should get:

Swiftcast (THM)
Cleric Stance (CNJ)
Aero (CNJ)
Protect (CNJ)
Stoneskin (CNJ)

TBH it depends on the content. You'll also get Blizzard II and Surecast on your way to getting all the aforementioned above.

Swiftcast, Cleric Stance and Aero are main-stays, the rest depend on what you're doing. You don't need to have Protect slotted if you run 8-mans with a WHM, for instance. So you can basically fiddle around with the 5th slot at times.