The blaster can pick up the fire shield, and use IOs to cap fire resistance and soft cap defense to fire. Bonfire also adds another layer of mitigation when adding KB - KD IO.
For example this. Im sure it can be optimized but it may help gives ideas.
http://www.cohplanner.com/mids/download.php?uc=1476&c=677&a=1354&f=HEX&dc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
Sorry for the data chuck, unsure what thing to use to get the power listing way others use lol.
Yes you get runners which is a bit of pita, however bonfire and Blizzards Knockdown stop most from getting away.