Late Game Help for My Friend and I

[Doctor Doom]

Two friends and I are playing a Civ 5 game with 4 people including us and 1 AI left and I was wondering what you guys think we should do. One of them wanted try an ICS piety empire thanks to a guide he saw on here!

The Player's are

Shoshone - Me
Mayan - Friend
Brazil - Friend

Germany - Some Online guy (Will be playing with us again)
Dutch - A.I.
England - Dead


The guy playing Brazil is very new at Civ V and doesn't really know all the tricks.

Save file included

Thanks so much!