Mine would be
cash ops per share/share price.
i like this to be less than 7.
Reason: Cash is the main reason for operation + cash trumps puffed up accounting profits
Net debt/Equity
I like this to be 40% or lower (preferably debt free, of course)
Reason: Cashed up companies don’t go broke and can weather a crisis.
Enterprise Value/EBIT
I like this ro be 8 or less
Reason: This gives me a sighted on relative value.