EV training my penta-perfect Adamant thick fat male Snorlax to be an offensive-Lax.

Was thinking 252 Atk / 200 SpD / 56 Def

Smogon suggests swapping 56 Def for 52 Def / 4 Spe.

What does /vp/ think? I wouldn't have thought the speed advantage situation would arise often enough to justify 4 Spe EV's.