What are the best colognes to wear over pheromes?
I was thinking along the lines of:
Le Male
Drakkar Noir
Polo Black
What do you guys think (maybe no cover scent)?
Drakkar Noir and Polo Black have been commented on favourably by posters here before but really, almost any good quality cologne is usable for a cover scent - There are many, many threads in Mens and in the perfume forum discussing individual choices. 
Don’t go unscented - Scent is a vital component in the mechanics of pheros as it promotes efficent diffusion from your skin and helps offset the natural scent of the pheros themselves and any breakdown products. Both of which can be unpleasant to some people. Individual response to phero scents varies wildly and a cover scent helps balance that.