In a form field one can choose only one validator to use (one drop down).
This means that if you use 2-3 validators in your project very often, one must encapsulate their logic into a single one.

An example

• Regexp validator with general check for all fields.
• Password validator for the password field.

Possible solutions

• A multifield value should be used to allow choosing a 1:n relation.
• Use a coma-separated list of validators (with custom transformer for the validator field)