Just to make sure:

The Capitol gold Rangers allow other RANGER units to roll +2 green dice. The Bauhaus Venusian Rangers do have the "keyword" RANGER, so they should get the bonus too, don't they?

Yes, this is the case.

oh, cool! I havent thought of that... Gives some interesting options. Allthough, playing an unmixed faction is by far the coolest.

Lord Tengil said:

I can't decide for any faction, so tomorrow I'll be playing a mix of human factions against fellow forum member MarceAndrade's Brotherhood ^^.