The main issue about this SA is that it was supposed to be available in 3.0 only where hard mode drop advanced threads and normal mode drops only medium threads, so is a deliberate choice by the chinese developers that is not beatable with low power, because at low power you don't need at all advanced threads so, if you still need them, you are supposed to just go for normal mode. Oasis rushed things with the outcome that now is harder to get medium threads for f2p people.