Lower Ruby Chief's rolling hills are great for getting comfortable on intermediate terrain.
You can access Lower Ruby Chief from the Red Lady Express via Bubba's Shortcut and Ruby Access and from the Teocalli lift you can take Short Cut or wrap around onto Ruby Access.
You can also ski Upper Ruby Chief, a more advanced intermediate run to get on Lower Ruby Chief, or Ruby Road, which cuts through the Silver Queen/Front Side area starting from Paradise Express.
Lower Ruby eventually passes under the Paradise Express taking you to the base of that lift or the Paradise Warming House.
You can stop there or continue to Teocalli lift via the Conundrum trail or continue on to East River.