I have the same rocks mixed with a little soil, and the same kind of old slash piles to redistribute as dragoneggs (although his look bigger), at our place outside Snohomish WA. I also have a
bx25d, and added a piranha to the bucket. It has been very helpful in ripping out brush (lots of salmonberry and devil's club, mixed with vine maple), and driving into piles of fill dirt. But for plain excavating, I still mostly have to loosen things up first with the backhoe. Perhaps a more aggressive toothbar version, like dragonseggs, would dig better. Still, the piranha in general is great to leave permanently on the bucket, and I use it quite a lot for backdragging, either with the teeth down, or with the flat of the bucket, as circumstances require. In
many places, dragging with the teeth has been a pretty good substitute for using the boxblade with the teeth down.
In the current downpour and resulting mud, I haven't been able to do much of anything with the tractor. I imagine it's just as wet where you are. Our streams are roaring, our pond has flooded, and some of our tractor roads are under water.