When should you play Ep II

[A.S.]

I would play Ep2, but you play Temple if you're weak, and Desert [Ruins] if you're strong, you know. Ep2 is clearly more fun, but more difficult than Ep1; thus, I recommend leveling up in Ep1 first, then play Ep2. I know a lot of people to this: Go through Ep1 modes as quick as they can until Ultimate, then play Ep1 when they are weak, Ep2 when they are stronger, Ep4 when they are strong enough. Then people play all modes sparingly, I know a lot of people pay more attention Ep1 than Ep2 regardless of their level.

EDIT: lolz, there is practically no story to Ep1 or Ep2. Some things in Ep2 are relevant to Ep1 in terms of storyline, but you really wouldn't care about them. o_O;;