At what level is it a good idea for retainers to start Quick Exploration?

At lower levels retainers level much faster doing hunting/logging/mining than quick explorations, but doing quick explorations will bring back green and blue armor that can be exchanged for company seals, and then ventures.

So I wonder at what level (retainers) will they start brining back enough green/blue armor to be self sufficient in getting ventures?

Send retainers out for quick explorations after they have at least level 70 gear.
The potential item pool expands as their stats go up, and before this point they can hardly bring back anything interesting.

ilvl 110 is when you can start getting Black/white dye. Which sells for 200-500k each.... if that explains your question? 1.6milish xp