Actually the A380 only have two independent hydraulic channels, yellow and green with each channel pressurised by four engine driven pumps (only two is required) at 5000 psi though it is supplemented by several Electrical-Hydrostatic Actuators (EHAs) and Electrical Backup Hydraulic Actuators (EBHAs) as well.
You also have four main engine driven Alternating Current (AC) generators providing 115 Volts Alternating Current (VAC) at 150 kilovolt-ampere (kVA) each to four independent AC buses (AC 1 to AC 4), not to mention the Auxiliary Power Unit (APU) with two AC generators providing 115 VAC at 120 KVA each and ultimately, the Ram Air Turbine (RAT) is there to ensure the EHAs and EBHAs do not go offline by providing electrical power to a separate AC Essential (AC ESS) and a AC Emergency (AC EMER) bus.
IF ALL OF THE ABOVE FAILS with the possibility that you may strike the first prize lottery 14 days in a row, the A380 will hopefully degrade gracefully from normal flight control law to alternate or even direct flight control law giving the pilot enough time to land with differential engine thrust before plunging to the ground.
