I'm making a beer bucket cake for my finance for this Saturday. I'm not sure if I should use my ice mold or just make a slab of it and break it into pieces. If I do the slab do I just pour the isomalt onto wax paper and just break it? What id the best way to do thus? Also should I make it today (Wednesday) for saturday or just wait until Friday? I cant do it tomorrow because my fiance is off work and its a surprise.

I made ice by crinkling up NONSTICK heavy duty tin foil and pouring it in. Popped out easy peasy too and less cleanup. All you gotta do is make sure you don't overcook the sugar - but I see you're using isomalt anyway and I hear that it doesn't get yellow as easily.
Good luck!