"Shadow Sneak is recommended in tandem with Hammer Arm, because the priority negates the speed drop somewhat. Shadow Sneak will easily OHKO Azelf and Gengar after a Bulk Up, and severly dent the Rotom Formes and other Revenankh."
+1 Shadow Sneak
vs 0 HP / 0 Def Gengar 78.16% - 92.72%
vs 0 HP / 0 Def Azelf 62.54% - 74.23%
vs Max HP / 120 Def Bold Rotom 34.21% - 41.45%
vs Max HP / 120 Def Revenankh 34.38% - 40.63%
Doesn't OHKO Gengar (although 30% chance after SR) or Azelf and Revenankh and Rotom formes aren't 2HKOed so maybe severely dent is an exaggeration.
otherwise good job and as you say complete.