I have Thorn and Hard Light both nearly to the last 3 damage upgrades that require Ascendant Energy. I love them both like my own little weird looking, destructive children, but I don't have enough energy to improve both and likely won't for a while. Which should I improve first? I use Hard Light more in the Crucible (duh) and tend to like Thorn in PvE more, but I suspect that will change when Thorn receives that buff they were talking about.