Synergia is right on par with praying xp. I get about 1200 xp per 600k coins prayed.
that may be true for you but in my luck i get a lot of reds and greens ergo i get a lot more by using synergia but that may bot be true for everybody else as you just pointed out
I believe that if life gives you lemons, you should make lemonade... And try to find somebody whose life has given them vodka, and have a party.