Post your playable Crush the Castle 2 maps. There are other threads for talking about CtC2. If it's not good for shooting at or interesting to look at don't put it here: NO castles that fall apart by themselves, NO random junk piles.
The 75% is more like 15% and the problem is the lead structure. Fire shifts stuff. If I hit the lead structure just above the bottom, it seems to work but the hit must be precise.
While the fire is the easiest, try it with a remote or timed bomb. Also, acid can crush it in one if you hit the right spot but, ice and stones are cool for two!
I had no idea this city was so big. Our troops are tired so we need to rest. I see a SMALL PALACE on that hill. If we take it we'll have a strategic position right above Algiers. It shouldn't be too hard to take it since most of the enemies seems to be waiting in the fortified part by the sea. Let's move!