question about black dragon's rain of fire ability

[echo]

Hi all, I had just tried to search for the answer to this question, but was unsuccessful but hoping someone here can help me if it's possible.

My question is, for the black dragon's rain of fire ability, is there a way to control the path of the dragon's flight hex by hex? instead of letting the computer choose the most direct route for you that is.

for example, sometimes i see enemies laid out like this

. . . . . x
. x . . x .
. . x . . .

where the . are blank spots and the "x" are enemies. I would like for my dragon to fly in that "v" pattern and hit all 4 targets, but so far I haven't figured out how to do that yet. Is this even possible?

Thanks in advance to any who can help!