This makes the new bombing daily boxer friendly. Set the macro so each bomb is dropped slightly offset then set your characters to all take off at the same time, when you get to the chasm start spamming your bomb button. I follow behind with my main and kill the sorcerer's manually.

/use Arcane Charges
/run Minimap:PingLocation(0,10)

/use Arcane Charges
/run Minimap:PingLocation(0,5)

/use Arcane Charges
/run Minimap:PingLocation(10,0)

/use Arcane Charges
/run Minimap:PingLocation(5,0)

I have trouble getting credit for the sorcerer's on all the characters so I will run down to the chasm entrance and kill the lone sorcerer you can reach. Using this I get credit on all 5 with one bombing run and a quick ride south. Don't forget to convert your sentries on the way.