i realy don't get the BOAMB MOAR advice: wouldn't bombing again and again just get in the way of learning and practise?
No. Just no. Forget the "no bombs no deaths" replays you see, the perfect lunatics. This is 1% stuff for 1% of players - the best giving their best, after dozens/hundreds of hours of what might be as well described as NOT FUN AT ALL grinding. Touhou is resource management, and wasting resources in a resource management game is stupid.
So, if you want to win, bomb moar. If you want to get better, challenge yourself above your level - not bombing is a pretty sizeable restriction - but don't complain that you can't win.
edit: also, StB is everything anyone at about normal modo level needs for practice, but everyone also keeps complaining that it is "too hard", while everyone loves spell practice which is basically the same thing but less polished - and I also doubt that most of the people who complain about StB's difficulty have 222/222 in IN, or even near that.