I Saw in a Zerkovich Video, the new empire archer general. He gives some nice range habilities.
One of them is the oil flask, than in 70 meters gives +50% Flame weakness and -48% speed "when contact".
But its only in the moment of contact or its for a few secs?
The range is Short, but if its for a couple of secs that can be game changing in combination with flame sword.
Imagine, you charge a monster/charcter whith demigryphs for example and then spell flame sword. Then you throw that and the monster have -48% speed, 70% weak to fire, and you have flaming atacks and +20% weapon damage.
So basically, you do x2 damage and the unit cant scape, because of -48% speed.
This also can work in focus fire, in combination with the other hability that gives +30 recharge and fire damage. You can combine that with a fire ball (to impact and get extra 20% weak to fire) or pague of rust, and you delete the targe really easy.