Jamesbonded has the best advice here. Try it out yourself.
The 10%/90% thing is just a mentality. You can’t really quantify how much effect your actions have and how much effect the pheromones have. So it can be 20/80, 23/77, 48/52..etc..
How much game do you need if you drive a ferrari to school? Not nearly as much as if you drive a pinto, but if you never talk to the girls, then it doesn’t matter either way, right?
Same thing here, you could say in the above case, the ferrari is doing 90% work and you’re doing 10%. Who cares what the percentages are, just go out there and have fun with the girls. 
Instant Openness and Instant Honesty is the basis of CTTM2. It’s been done and is very effective. Stop thinking/wondering and find out for yourself what works.