Normal quests chains are good for experience and the occasional reward, but hardly pay any Requiem gold. Scroll quests, on the other hand, tend to pay very nice amounts of lant on the side, and a little extra experience to go with them.
And the good thing about scroll quests is a lot of them can be done while grinding. Do whatever scroll quests you can at your level, as they are pure profit in the long term.
Then Consumables level 50 and above. People spend a LOT of time in their 50's and 60's; the grind to level Requiem Lant 70 and above takes quite a while at that point (even with lots of quests). Save the items people intend to use most on the way there. Such as: Supernus Ion Energy III or Eximius Ion Energy I: Sell these in the auction house for somewhere between 3-5 lant each.
Not only will you make a profit on them selling them this way (as opposed to only getting 1 lant each from a peddler), but other Requiem players who need them will be happy as they will be able to buy at a discount, as opposed to paying full price at a peddler.