Smart Campaign Best Practice: One or Many

I need a sanity check here from the masses.. 

Scenario: 

A nurture of let's just say 6 emails is to be sent out, What is the "best practice" in marketo to set up the following:

Is it better to: 

1. Have multiple smart campaigns (1 per email) for engagement activities (opens, clicks, etc.) with 1 flow step. OR

2. Have 1 smart campaign (for all emails combined) with a flow step with multiple choices (for each email choice). 

ex.)

1. Smart list: clicked email 1

    Flow: Change Status in SFDC: Clicked

2. Smart List: Clicked Email 1,2,3,4,5,6

    Flow: Change status in SFDC:

         If Email 1 -- SFDC Campaign 1: Clicked

         If Email 2 -- SFDC Campaign 2: Clicked

         If Email 3 -- SFDC Campaign 3: Clicked

         If Email 4 -- SFDC Campaign 4: Clicked

         If Email 5 -- SFDC Campaign 5: Clicked

         If Email 6 -- SFDC Campaign 6: Clicked

We want to minimize processing power in marketo so which one takes less power?