Lol, what's the difference between taking any collection of maps and practicing them over and over and doing the same with these BeForU maps? In the end practicing the same maps over and over will only help you with ... wait for it ... those specific maps. In my opinion the key to improving is to diversify. Play as many maps as you can. (And FC them) Playing different maps and learning how to read notes fast is better than learning obscure patterns that only occur in one map imo.
If you're having trouble with a certain aspect of the game (Jumps, streams etc) then there are better maps to help with that and it would be more advantageous to focus your training on those areas instead of restricting yourself to maps by 1 random artist ? ;p
I realise that this thread was started in jest almost (or wasn't it?), but people seem to be taking it really seriously nowadays. These maps don't have magical capabilities. You would get the same results if you played other (quality) maps as well
osu! is all about practice. As long as you play maps that you aren't fully comfortable with you will improve
One also has to remember that these maps aren't nearly as hard now as they were a year ago (On a relative scale)
Setting up gameplay specific training packs would be better imo. A specialised pack for jumps, a separate pack for deathstreams etc.