Flashing tools needed for console repairs

I love your channel and want to do more console repairs but i am stuck when software modding is reqiured to repair something as i do not have flashing tools.
What do you suggest for xbox systems and ps4 and ps3 etc,example jtag tools ps3 flashing like e3 FLASHERS.
I want to know do you get a universal swissarmy flashing tool. for all consoles
or at least tell me which tools is the best to get for all consoles,even ps5.

teensy is a good tool