I assume you meant 1w1nw.
Yeah, i assume this too. But please let me suspend my vote, I'd like to hear more from the others first.
Your questions on team play:
First off, with random personalities you will hardly know who you're actually facing, as i wrote above. I've heard of a way to know this using the Python, but never found how it works.
Assuming the map maker does NOT know who we're actually facing, it can be easy to couple a -normally- peaceful and trader AI with a warmonger jerk. Provided that those warmongers jerks not always act like they usually do. I remember a WotM with Ragnar as a far neighbor where he acted more like Lizzy than like Ragnar. Thus there's a random even without random
They will be penalized by 50% on research, but this goes after thay have roughly doubled their research capability, being in team. And they're Emperor AIs.
They can have different behaviours or feelings about any other player, AI or human (you can have OB and trade techs with one and the other one is annoyed, but he has OB with you since you got it with the other player in his team... not completely sure on this). But, since they're teamed, if one declares, the other one will declare too. Same, if we declare, we declare on both.
No, they doesn't necessarily share the same religion, or civics. They're completely independent players. They can decide to research different techs and they will automatically share both (no need to trade) when they're finished to research or they can research the same tech at an impressive speed.
They will start with the starting techs of both players in team. No need to have Alpha to trade between players (2 or more) of the same team.
I think UN diplo is the last VC we can think to pursue. Their votes will be individual, but it will be far more difficult then a normal game.
I think we can try for culture if we manage to have 3 religions, which are the minimum requirement for a decent date. Or one of the military options. Space will hardly be competitive. But it's too soon for this, Let's wait to have the Oracle in the pocket, then we can start thinking to the grand strategy.