Banks

When you research Fusion Cell, You Unlock bank , which has a description of Boosts surrounding offices 2.5 Times, Cost 4 trillion, and has a max heat of 1, It is the best to lay out a checkerboard of banks and offices, Which is nearly 39 Times the amount if that is surrounded by 4 banks, It costs 400 research, I think it is the best to use banks, Large Office (Or Huge Office ) and Battery.