Well, from Kasumi's viewpoint, she didn't waste that effort.  It wasn't her fault that the Inspired's own device was designed to prevent any minions living to escape the Monolith's destruction.<br/><br/>Oh, Mark may have not been damaged in the blast.  Not only did Kasumi start stripping the Ambasador's body the moment he fell, holding him at the time as she was.  She asked Mark to escort Marc the IVth and Sam back to base.  So he would probably have been out of the radius of the blast.<br/><br/>Either way, we're all alive and headed back.