OK, I'll bite. If my lead matters, it has to be a ♦ or a ♣. It could be necessary to cash a trick in either of these suits or to set up a trick in ♣s. A ♦ lead could blow a ♣ trick in the obvious way and a ♣ lead can obviously blow a ♣ trick. I'm going to lead the ♣J since even when it blows a ♣ trick, it looks like a stiff and may lead to winning 2 ♥s.