Skipping Darklight?

[OnyxStrife]

Pretty straightforward question here. I've noticed that there's a decent amount of i70 gear on the market board that seems to be pretty costly. My question is if I were to buy the regular i70 gear instead of spending time getting darklight, will it be okay for me to go straight to farming for i90 with that?

Or is having darklight gear worth the extra time?

I ask because I'd like to spend the time between gathering tomes of mythos leveling other classes