You need two ladies who work together regularly.
You usually only find this with an Independent & friend.
The only time I have ever had a massage with two girls was with two girls who were friends. They would rent an airb&b for the day, have their own rooms and clients, but also work together if requested.
I would say it was the best paid experience I have ever had, definitely helped by the fact they were independents and clearly friends. It wasn't exactly a massage, I ended up just lying on my back and being pampered and played with by two girls as I played with them.
They utterly edged and teased me to the very end, where I shot so far it ended up hitting one of them on the shoulder.
I actually saw one of them on her own afterwards but it wasn't even in the same league.
I have forgotten most of the girls I have seen, but that is the one stand out experience and I still think about it 8 years on.