Was reading online that if one were to obtain a Ditto with Imposter for the purpose of battling that only the HP IV/EV is needed, as the rest of the IV/EV's are copied from the target.
Is this accurate?
Correct. Ditto copies the IVs, EVs, and stat bonus's from the Pokemon it transforms into.
Imposter allows you to transform the moment it enters and saves you an attack turn. Holding a quick powder(I think that's what it is called increases Ditto's speed stat) making it always faster then the transformed target so you can attack first.
The one downside to Ditto is he only gets 5 PP of all 4 of the pokemon you transformed into.