I play within 20-40 ping and still had trouble with Drill not registered in Wildfire window.
I don't know how smooth the ping is in Japan but I hope this has been written by the dude who designed MCH in SB, otherwise I'd be worried to see a game designer working on MCH having no connection with the community as a whole.

The best we can hope is that this guide was written in prevision for 4.1 and that Drill will register the damage faster aswell with some Hypercharge balancing?