There's a few ways to do it. Check out hyrdoholics.net. You can use their 5 dump manifold or 2 three dump manifolds. Envious Touch makes manifolds as well. Both are on LIL.
I've wired a 1/8 before (PH manifold), so that's not an issue. I just wasn't sure which way to position the dumps for a 1/5 to operate properly. And yes, I totally agree that a manifold makes it way easier and usually makes for a better looking setup, but plumbing multiple dumps can be "pretty" as illustrated by Aaron's old Acura.A manifold is an aluminum block that holds more than one pressure release cartridge . You can piece some dumps together with separate blocks and have the same thing,except then its work to make it pretty.
Wiring is simple. Some valves block lines while other valves open up to the cylinder you want to fill. you can do that with double pole double throw switches. The negative of manifold setups is 4x the fluid goes to one cylinder when lifting a single corner. Way faster than lifting the whole car or 2 wheels. But no one markets double-gear pumps, so its either deal with crazy fast corner adjustment, or multiple motors