Greetings Fluphen, long time no see. Done with school, yes, millionaire, not quite.
I used to do builder opening when I have a mining/camp luxury... meet neighbor AI and gift the luxury, and wait for DoF.
This may allow you to do early game things in peace (get mining and go for pyras, etc. instead of having to beeline archery etc.)
Used to work fine pre-last patch where you can "stop" an AI invasion who is right at your doorstep and waiting for the DoW by just offering DoF... once accepted it's like the AI's units are confused as to what to do and start shuffling around your borders.
Well, the last patch fixed that. Now, no matter how friendly they are at (with several green modifiers) they will always DoW once they have made their mind about launching the attack (even if they have to walk 20 tiles to get to your lands, they will do it); they will never accept DoF. So that opening, for me, is no longer that viable. I just sell the lux for gold and prepare to defend.
I have to say, I missed the BNW diplomacy--in RnF diplomacy is almost meaningless early game as AIs are complete jerks (and continue to be such throughout the game despite alliances, etc.) they will siphon your gold, neutralize your governers, and conquer your allied CS--worst case scenario surprise-DoW you the turn your alliance expires despite all those green modifiers. The "nice" AIs of BNW who vote for you to be WC host no longer exist (now it feels everyone is BNW Dido)--which I feel perhaps might satisfy some people, but I would've liked to see some variation in personalities. I am a lot less inclined to be "nice" to them as a result (you know in BNW I always give gifts whenever my friends ask, vote for their proposals, not coup their CS, etc. now? forget it!)