I've been fond of using Papal Primacy lately - this religious belief causes City-States that have your majority religion to gain +15 to their influence resting point.
When coupled with Aesthetics, from Patronage, which adds another +20 to the resting point, you will eventually become friends with any city-state that adopts your religion. Granting your protection can even add another +10 for a total resting point of 45.
However, the amusing part about the first two...is they'll take place even if you haven't met the city-state! You can actually 'become friends with' and receive friendly-status bonuses from city-states that have yet to show up on your diplomacy, and you cannot talk to.
Pretty neat if you're playing Ramk, Greece, or just aiming for city-state friendship in general, under certain conditions.
When coupled with Aesthetics, from Patronage, which adds another +20 to the resting point, you will eventually become friends with any city-state that adopts your religion. Granting your protection can even add another +10 for a total resting point of 45.
However, the amusing part about the first two...is they'll take place even if you haven't met the city-state! You can actually 'become friends with' and receive friendly-status bonuses from city-states that have yet to show up on your diplomacy, and you cannot talk to.
Pretty neat if you're playing Ramk, Greece, or just aiming for city-state friendship in general, under certain conditions.