The rat will (of course) supply the complete blue system with 70l/min (the elec pump only have 25l/min, the EDPs 140l/min) and will also supply electrical power via CSM/G
If the APU is running, it is your lucky day
The APU will supply electrical power to every System/Bus, pneumatic to als pneumatic systems and hydraulic is working via both pumps (green and blue, yellow ist powered with the PDU from Green). This config is therefore nearly normal flying like with a glider