That was a cool jam, it payed good attention to the groove.
As a start, I didn't know what Complextro is, but my latest tune (Phantom) did involve a lot of counter melodic synths. According to liquid ooze this is a part of it. I really love doing stuff like that. I'm not going to link it here for fear of promoting my own song out of place.
So, I recommend making yourself a few cool nice sounds with 3xOsc (or some awesome VST that the regular folk can't buy). Be sure to add some reverb to them. You might want to automate it for certain sections in order to avoid clashing melodies, or just make sure to write in such a way that your reverberated sections harmonize with each other. Even if its only ever so slightly, it makes a difference.