Coming from an amateur with limited gear: I'd probably go for 24-70 and 70-200 2.8 IS (on 2 FF bodies), but as said above, if you have to ask this question here, you should really doubt whether or not you should shoot weddings (on a pro-level - as a primary shooter).
Situations can change and you might have to change strategies very quickly, like switch to a low light prime or pick something wider than 24mm, etc.
Not everything comes out best with natural light only, so having the proper flash technique down can help out.

but then again, those tears will be HUGE ! 


use it. If not change it. learn what works from experience and practice. Understand what lens will give you what advantage. Best two lenses in a wedding? A good portrait lens and a "fun" toy-ish lens... everyone has a different opinion on what is a good portrait lens and what is a good toy lens. Each photographer needs to figure that out for them self to be able to create images that they want to create.
