There was a pua from another forum I use to frequent. He was the only one who really "got it" and realized it wasn't about the techniques as much as the attitude much like many members of this forum. I've field tested this soo..
Here's what happens when an Alpha Male/PUA attempts to approach your set or woman. You'll want to use this as an opportunity not to prove you are more alpha but to run more game on the girl. You want to disqualify, disarm, and escalate to get the girl running back to you.
Say an aggressive Alpha starts obviously hitting on your girl. Be aloof and humor the clown at first. Find out his name and with a smile turn to the girl...
YOU: "Hey I think whatshisface is really into you, you should totally hook up!"
1) You use kino. Rub her back or something similar physically to "convince" her to go with the guy.
2) False-Disqualifying. Hopefully you have been building up her attraction in you so she is already more into you than the new guy. So you actively disqualify yourself (basically step down or retract your interest in the girl when you said "You two should hook up") while attraction-spiking with physical kino. Done right this will make her MORE attracted to you and she'll want to continue to chase you.
3) Instead of trying to compete or hand her over to the Alpha/pua use this invasion to run more game on the girl. Indirectly flirt with her by speaking to the Alpha ABOUT HER. Continue to rub her back and say something like...
"She's cute isn't she? You be good to her or I'll have to kick your ass, she's like my adorable little sister."
Then you hug her close, kiss her on the forehead (I like to whisper something naughty or funny in her ear), pat her on the booty then push her toward the Alpha.
4) You'll highlight his interest which contrasts with your flirtatious disinterest. This makes your value appear much higher than his.
The Alpha will think you are helping him out and will overgame her, meanwhile the girl's attraction will be focused on you because you showed a A) protective side "Treat her nice or I'll kick your ass" B) Leadership/High value by pushing her off towards him while C) Romance/Sexual escalation by kinoing her the whole time.
It should hit enough attraction switches so quickly in her and raise her interest in you more. She'll be so invested in you and the Alpha/pua will be overwhelmed and stumble because he thinks you gave him what he wanted. He will overgame and show too much interest to a girl you just heavily flirted with while similarly passing off as no big deal. It's the same effect as seeing a parent with a really shy kid trying to get the kid to say hi to another grown-up. The parent tries to push off the kid "Say hi to the nice man" but the kid doesn't know this new grown-up so they hide back behind the parent and cling to their leg.
If the attraction is already there than this technique should have the same effect.