Interesting Method you got going for you.
In regards to your question about Choosing who to have a relationship with, I have an answer with Experience.
The Answer is BOTH.
Just like Gaming multiple woman, there is also a way to keep a relationship going with more then 1 with both of them KNOWING, i"v done it with 4 HB9's.
Disregarding the Initial Pick up, it starts in Comfort Building, you must systematicly build comfort with not only yourself, but between the girls aswell, you have done this step already, the next step is Satisfying them BOTH Sexually. Hopefully you have succesfully completed this step. the next is DO NOT TRY AND CHOOSE ONE OF THEM. Choosing and Limiting yourself to only one is an AFC Belief. you CAN have a "relationship" with more then 1
When you are Going out, take both of them with you, when telegraphing interest do it to both, treat both of them as if they were 1 girl, if at anytime you communicate "Choosing" one over the other, the oppertunity is coming to a close. never Isolate one over the other, if one goes with you some were and the other tries to stay...That's a "No no" have both of them with you at all times. If one of them tries to communicate a "Choice" Communicate to them in a C&F way that there mistaken.
When they communicate for NO "Choice" then REWARD them for good Behavior. If all this is done correctly you will program them to have a "relationship" with you.
After all... You going to the beach with them and doing a second date IS A "RELATIONSHIP" you already have one, dont fuck it up and "Choose" It's a new experience to dump 4 girls at once
BTW- Kenpo/Tai Chi-Chi Kung-Nei-Kung/Wing Chun and now going into WuShu

However my best art form... is "Scorpio Seduction"
Keep Gaming, Live Life- Scorpio