Before combining, make sure to test each out separately so that you are comfortable and familiar with the effects and required dosages of each. This post should help How To Find Your Sweet Spot (How to find your sweet spot...)
A314 can make you more serious than you might want to be around her, though Instant Shine will soften that up a bit. Save the TUTH until you are in a private environment together and things appear to be heading in a sexual direction (at least until you become more familiar with TUTH and its nuances, then you can play around a bit more with it).