What is the quickest way to be liberated/ salvation? Does it differs for householders vs monks/ nuns?
The quickest way to Moksha (liberation) is through attunement to a Self-realized guru, and through a balance of deepening meditation, such as Kriya Yoga, and selfless service.
This is the same for householders as well as monks and nuns. Inner renunciation is essential to all devotees if they want to attain liberation.