the AI will reduce the overall estrogen in the body by preventing the excess testosterone from the 4ad to aromatize into estrogen. not a bad idea, but may hamper gains, and WBC's during cycle. i would go with the SERM because it attachés to estrogen binding sites(most abundant in breast tissue) and prevents that tissue from being effected by the rise in estrogen. since you already have a pre-existing gyno condition, i would begin the SERM of choice starting on the first day of the cycle rather than waiting for an inevitable flare up, worsening your condition...
i was thinking of doing this same stack in July.