What's the best unit for Flaming Arrows?

[moderation]

With Flaming Arrows in effect, are crossbows still better than shortbows when firing on heavily armored troops? And how about against light or medium armor?

I'm assuming crossbows will still hit slightly harder even after the Flaming Arrows effect, but is it worth the slower fire rate?

* This is referring to Conceptual Balance by the way.