Now here is my thing, as a former soldier I know the value of anti-personal weapons (mines). My play style in these games is the noble warrior. The guy who knows and acts on what is right, but is not afraid to use every tool in his box to his advantage. To that end I tend to use guerrilla tactics in games, set them up with a little stealth, then rush in head first and destroy them while weakened and confused. I see these runes as greatly augmenting my in-game combat style.
I mean just imagine for a moment we can use them and they are remote, just for the sake of argument. You set one at a main gate of a village, say with a major fire or paralyze effect. Start in the village center (legion village of course) and begin the wrath. Guards advance and you fight off a few, but the battle is turning against you. Get your remote ready and run for the gate. Get through and hit it as the guards pass. You'll find escaping alot easier. Many combat options.
So here's the topic, if runes are what they seem to be, would they be useful for some forms of combat and stealth, and would you use them?