To be honest, neither of these would be on my list of first choices.
Triad Coalition Platform
Aggressive/Philosophical
Tribal Council Platform
Financial/Industrious
Both financial and philosophical can provide a corner stone for an economic strategy. To say which one is better IMHO will be a bit map dependent. This game is currently defined to be a Fractal map. Fractal provides some very interesting maps to play with, but they do tend to be a bit random. You can get anything from a pangaea type map to a series of small continents or islands. There is a good probability of water on these maps, thus I'd say that financial could have an advantage.
I don't really care for the aggressive trait. Although, it can be useful in some games. But as a general rule, it is one of my least favorite traits.
I don't really care for industrious, either. It can be useful for OCC and culture games, but otherwise I rarely focus on building wonders. Those cheap forges can be nice if you happen to start near gems, gold, or silver. But that is luck of the draw ...
The key trait for this game IMHO would be imperialistic. There are normally 7 civs on a standard map, but 9 have been selected for this game. The imperialistic's production boost to Settlers could be real handy on this map. Especially if you have several hills and/or lots of forests. Of course if you're stuck on a small island with an imperialistic neighbor, then that aggressive trait starts looking a bit better.
Other traits that I like would be creative for cheap Libraries, charismatic for the free happy faces, and of course organized is just an all-around good trait. Its also possible that the protective trait could come in handy, given the overcrowded nature of the map. Although I'm not sure, as I've never tried that combo.
I also think the true synergies of the traits won't really be known until the civilization is picked. But unless I'm mistaken, I think you folks have decided to set that one to random ...