I think it's way too hard to make a rage chest explode...I mean, last time I hit it so many times to make it explode and kill skellies until I got bored, killed the skellies with the cutlass....and it still had to explode !!!!
It's ok the timer between automous explosion when unattended but if a Rage Chest is provoked with shoots or blade swings, it should explode between 4-6 hits.
It felt different from Insider...might be wrong though.
