I would definitely apply the Invalid Link Removed in the morning. Evening applications can cause insomnia-like issues with some.
As far as application goes......concentrate the Sustain Alpha to your thighs and scrotum area. Apply the Dermatherm to your shoulders, upperback, stomach, flanks, and spread the rest over the course of your anterior upper body.
I wouldn't apply them both at the same time, or in the same area. I like the Dermatherm A.M. application, and the Sustain Alpha evening/night-time application.