I thought this thread was still focused. In Cully's last post, he wants to see a dramatic and gargantuan gesture in trying to stop the Dragons. He compares it to Tyrion's chain... which reminded me of Aegon's comments earlier in this thread of how to bring your enemy into a predictable pattern, how to dictate the geography (or hydrography, is this even a word?) of the battle, and how to use weapons that can inhibit the enemy's ability to move. Tyrion did all of that to Ser Imry Florent's fleet.
Tyrion may be the one to best devise a plan to stop Dragons.
But then again, will the Dragons (sorry, I can't stop capitalizing that word) be stopped? What if the Song ends with the Targaryen restoration, the repopulation of Dragons, and the return of Magic?
Does anyone in Westeros, barring Euron Greyjoy, actually have a preconceived notion of how to stop Dragons?
I'm currently rereading Ilium by Dan Simmons. Not to give the story away (so don't think of the following as a spoiler, think of it as a teaser), but it's the Illiad gone awry. Anyway, near the end Achilles and Hector team up and attack Apollo and Athena. (For those of you familiar with the Iliad, I repeat Homer's story has gone haywire.) Hector guts Apollo and cuts off an arm while Achilles opens Athena from shoulder to navel and hacks off a leg before Athena can teleport Apollo and herself to the infirmary. Hector and Achilles had a plan to deal with lesser gods, but when Zeus starts nuking Ilium they're SOL.
Dany may recruit more Dothraki to join her. She may buy more Free Companies. She may train more Unsullied. The smart commanders in the Seven Kingdoms will devise plans for dealing with horse archers, mercenaries, and unbreakable infantry. But dealing with Dragons?
If, on the off chance, someone devised a successful anti-Dragon strategy... why send in the Dragons against an entrenched position? Let the Dragons devour the wagons and supplies. Send the Dragons against strategic targets and force the enemy to to assault of surrendur.