Building a 0.6 ohm RDA is no different than using the battery with a 0.5ohm Atlantis. Do you mean killed as in damaged or killed as in drained quickly?
If it's not firing maybe there was a short somewhere on the rda. Screw it into the charger and apply power to it as normal, this will reset any short circuit trip, if the device has one.
You can use RDA's on that battery all the way down to 0.3. No difference between a tank and RDA as far as the device is concerned, it'll fire whatever is screwed on, unless it's too high/low a build.