Your set is very interesting, Citro. Hovever, i think (and always you have to consider my thoughts as to who plays only short time) this small reasoning: if Light Ball have to works you have to invest your EVs in SpA (and/or Atk). But Pikachu needs to have all the speed it can get. If we think that we are always review both physical (Extremespeed, Fake Out) and special attacks (Volt Switch and Grass Knot), Will you can split EVs between SpA and Atk? Perhaps it's too hard to build something strong enough. Raseri's set (that's the same in
Smogon's pokedex) it's IMHO more dangerous because it was building from awareness of Pikachu's weakness.