I have a very simple system:
My indicators and alarms are red, white and green. The receiver bleeps and the led lights in those colours.
As I go to the rod I check the bleeping buzzer for the correct led, and look at the falling or rising indicator.
This works with anglers who have a choice to be like me with different colour leds on the alarms, or those who chose to have one alarm led colour. The receiver will bleep, an led will show.
Now in the UK, there is a legal maximum limit on the number of rods an angler can use, a maximum of 4, and clubs may limit anglers to 3 or even 2, so the numeric readout is not a particular need.