There's a lot of talk about Germany, as always, and I think the best thing to do would be to boost Great people/specialists. Why? Because German culture and achievements are vast and varied, and this way both the arts, science and engineering side can be represented. Not to mention that there are a lot of famous germans in those field, per capita probably more than any other nation (and I say this as a Frenchman who has lived most of my life in England, so I probably have the opposite bias). Someone proposed a +1 production to all specialist in the previous page, that would work pretty well. Also good synergy with UUs. Alternatively, have +4 great people point per turn per specialist (rather than +3) might be good too.