Change Pupil Ranges?

Is there a way to set up different pupil ranges for certain eye states? For example, with a character that has a 'squint' expression with a smaller bounding box of motion - the pupils using the default pupil range in the 'squint' state will disappear behind the eyelids when looking up or down.  I've tried adding another layer with the more narrow 'pupil range for squint' and various combinations of swap sets and combined layer triggers and nothing seems to over-ride the default pupil range. The pupils still go too high or too low when squinting.  Much and many thanks for the help.