So I had this idea and I'm just throwing it out there for fun. I think it'd be nice if SE implemented training dummies that emulated the kind of accuracy and DPS you would need to enter a certain turn on BoC. I say this because like it or not you have to be prepared for those fights (among others) and it's a bad idea to go in unprepared and under geared.

For example: let's say you want to enter T5, go fight the training dummy that represents T5. If you miss it, your acc is too low, nail it, you're ready as far as acc goes. Also, give it a timer. After a certain amount of time it'll "grade" you on your damage output and you would prefer a certain minimum grade to enter that turn.

Just an idea.