How fast leveling for retainer

[ChameleonMS]

Nobody reply it... because you don't know?

Nah, we just do not remember. We haven't levelled a retainer for nearly 2 years, and that was only from 50 to 60. It has been more than 3 years since levelling one from lv1.

1hr Quick Exploration is the most efficient, if you can keep doing it.
18hr Exploration is the best use of your time for the situation where you cannot login for a period of longer than 12 hrs. e.g. going to bed and work the next morning.

Either way, you are still going to be looking at about a month to level up.