[Autumn]

The actual thorns effect on it really isn't that bad when you consider its a status based effect and not a item based one, so it interacts with far less of the game than armor of nails does. I think returning it to being self-triggerable is a good idea but instead of having it activate multiple times a round I'd probably opt to give it a bigger boom, far more damage for the cost of only being activatable once a turn (Probably 2 + UL*3 unprotectable). Then you can put some more strength into it's thorns damage effect so that people can run Burning Bracers with it again, which was.. the item's only use really, the lack of reactive armor means burning bracers doesn't see use either.

Either way, Reactive Armor is pretty bad now, only really good for it's base stats which are not all that impressive beside a Mayelia or Blackheart in it's current state.