Wirelessly posted (BlackBerry8530/5.0.0.1030 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)
Since you are willing to spend miles and money, are there no flights on LCCs that arrive DUB early enough to make the connection? If not, you might want to consider overnighting in DUB. Redeeming Avios for the DUB-BOS flight would be a very good use of them. EI is the only Avios TATL redemption option with minimal fuel surcharges (other than TATL flights that depart from Brazil).