Most people would do better utilizing transfer bonuses to British Airways or Iberia which are also available for the same time frame, as the specific utility for Aer Lingus Avios is limited.
However, there ARE some sweet spots in the Aer Lingus program such as awards from the East Coast to Ireland for just 13,000 off peak in economy and 50,000 points in business.
Not East Coast? Off peak economy is just 16,250 Avios or 62,500 in Business.