Great Guide!
I just started a Sonic/Energy last week and my build is very similar to this one, except I went with Super Jump instead of speed and took energy punch instead of Shriek to be more of a Blapper.
Just made 22 and Siren's Song really changed the entire character! You aren't kidding about the duration. I put one sleep duration in it to tide me over until Power Boost and casually put down 8 minions of a group of 10 before the last two woke up. Can't wait until Screech, "waking" them with a disorient should be great!
One word of advice, don't wait any longer than 22 for Stamina and if you can work it in by 20, Do it! Siren's Song and the energy melee attacks are NOT endurance friendly.
Again, great guide!
