Hi
Honestly, I would not bother trying to get a Safari Zone Scyther.
Have you ever tried to RNG in Fire Red before? It's a load of bullshit. Think of trying to get within 25 million of your frame just by soft resetting randomly. The game uses seeds like 4th gen, but no one yet knows how to hit a certain seed as far as I can tell. Also, there are no Synchronizers so hitting your Method 2 or 4 frame and encountering the correct Pokemon(in this case a Pokemon with a 4% encounter rate) is next to impossible. Also, the game alternates between Method 1,2,3(I think) and 4 spreads when encountering Pokemon. On top of that, you would have to soft reset until you got an ID/SID combination that gave you a Method 2 or 4 shiny spread.
If you really want to try it, I can help you over IRC.