You should be proficient at using your mountain axe. Self arrest, boot axe belay, pick positions, adze usage, all should be automatic. If you don't know what these are you should not be on Everest.
Have clients carry their own gear. Hardly anyone climbs everest any more except the Sherpas. They carry gear, set up tents, fix rope, carry clients oxygen, make tea for clients etc. Let clients do all this while keeping the Sherpas on board for back up. Let the client climb the mountain, carry their gear, set up their own tents, cook their own tea and meals.
Other articles regarding this topic: www.guardian.co.uk/world/2012/may/30/everest-mountaineer-crowding-hobby-tragedy