Watch the I - IV - VI - V Ionian online guitar lesson by Robbie Calvo from Modal Expose
The first five notes of this solo are all taken from an A major triad arpeggio which I use to enter my solo with very strong chord tone melodies. I then follow that idea with another A major triad line with and added 9th for extra flavor. Of course I repeat these ideas again to create hooks and motifs for the listener to latch on to and hopefully sing or whistle! If they do that you've done a good thing - made your music accessible to the masses!
The next idea is a double-stop idea using an A and Asus4 triad arpeggio which then resolves to an E5 double-stop to outline the V chord.
The arpeggio motifs are expanded further by using an A major 7th arpeggio to create some cascading lines before returning to my main melodic theme. You can clearly see that I am a firm believer in the 'Sweet Notes' approach to my solos and melodies. Of course these are just examples to get your creative juices flowing.
I wanted to include a scale run in this solo to demonstrate the Ionian approach and flavor and I think it added something different than the other ideas. Scale runs can also be used to great effect at the end of a solo to give the sense of excitement and crescendo. Try that for yourself when jamming over this track.