I only have one lvl 70 to do dailies on yet, but as far as the Dead Scar bombing goes I just bind the 'bomb' to one of my mouse thumb buttons and bomb like crazy, or well aimed and calculated anyway.
Get everything done in one run easy, so with multiboxing i figure as long as I get them all to fly relatively close to each other I can just bomb everything on my main and not worry about my alts.