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Blues And Rock Scale Options
So, this was still pretty dark and bluesy, gospelish sounding because of the mode change. If you wanted to make it more consonant ("inside") then you could just use the A Mixo mode over the whole thing. There would not be as much contrast between the changes, but it will still sound really good and it is very characteristic of Rock/Pop progressions to stay inside one scale.
When choosing to use scales over chords, it is imperative to target tones from the chords that are happening, from the scale in use. This is where a knowledge of chord tones, or what notes make up a chord, come in really handy.
In another lesson, MAKING LINES 1 and 2, I discuss this process.