This app was mentioned in 3 comments, with an average of 2.67 upvotes
You can buy two $1 package from Android and Iphone. And in Asia there is a Android Line version Endless Frontier, which I am not sure whether you can download it in US/Europe.
You can download the line version from here (I am not sure whether any restriction of area, or you may use VPN to download it): https://play.google.com/store/apps/details?id=com.ekkorr.endlessfrontier.global.line2
You can buy total 3 priests and you can get the fourth one eventually from the shop.
It was a bit annoying to figure out the first time, I'll see if I can recollect.
I think this was it, it's been a few months. If you search Endless Frontier APK Reddit you'll find some other posts - none seem to give a great description on how to do everything but I cobbled it together before.
Hope this helps!