User is forced to use "custom formula" because "And/Or" option does not work as expected.
See user manual.

And/Or - all conditions must be met, conditions having same tag name will be grouped by Or condition

Steps to reproduce:

1. Navigate to Configuration -> Actions
2. Create such conditions:
   1. B Value of tag a equals a
   2. C Value of tag a equals s
   3. D Value of tag b equals a
   4. E Value of tag b equals c
3. Choose Type of calculation: And/Or

Result:
A or B or C or D

Expected:
(A or B) and (C or D)