Rushing through any age is the biggest mistake you can make in this game. Each GB is age specific so aiding buildings from its age will help. So the further you move up away from the early ages the harder it is to get the BPs for those ages.. Zeus for instance is a Bronze age GB so aiding Bronze age buildings will help you get BPs. If I remember correctly the best BA buildings to aid for Zeus are stilt houses, theatre, school, flower deco and blacksmith. The other BA buildings are better to get ToB Bps. But INNO does that with every GB, they make sure you are left waiting on one for ages with the hopes you will give in and spend diamonds to get it LOL Unless it is for the likes of Col which you will never build.