I raised myself a Scolipede (whose pentaperfect mother I got from an Anon for helping him hatch a foreign-language Venipede weeks ago, thanks :3), but am undecided about its moveset.
Obviously it will be used to Baton Pass speed boosts and Sword Dances, for which Substitute is useful too.
But it's got a decent attack stat and can do quite some damage at +2 with X-Scissor or Earthquake.
Which of these five moves should I drop? Substitute, which would leave it vulnerable? X-Scissor or Earthquake, which would limit its usefulness as a surprise sweeper?

Or perhaps I should replace Swords Dance with Weakness Policy, supposing that the item is activated through subs as well?