Oh boy! Am I sick of chopping rocks! S8, can't the drop rate of the cursed stones be adjusted? It's incredibly low. The dead trees work better for the vines. For me it's just boring because by level 50 the coins to buy the rocks and dead trees aren't a problem, but it must pretty awful if you are at a lower lever. I also had a LOT of horses for an earlier event and that helped with the horseshoes once I realised I needed them. Even so I don't imagine I'll get to the final individual prize as I'm not going to increase the horse herd which is already pretty large.
I'm hoping that i'll get to level 5 of the castle later today, but I've no idea if I'll manage all of the levels. Will just take it as it comes.
The only positive thing I can say about this event is that, for those of us who have got to the end of the story, it gives you some goals. And it's not quite so pointless as the other monster spawning event.