Efficient way to power stacked rows of pistons?

How can I power two vertically stacked rows of pistons, hopefully with a minimal number of repeaters? I can get the bottom row powered with just a line of redstone on the gold blocks behind as shown, but can't figure out how to do something similar for the top row at the same time.

stacked rows of pistons


Solution 1:

You can actually save on the redstone torches and just raise your "golden block with redstone" line by one block.

The result is this:

enter image description here

Solution 2:

If you don't care about inverting the signal beforehand, simply use redstone torches behind the upper pistons to power everything:

The build