Originally Posted by
Tenhou
Third tier has a chance of giving 4 chests and always 3. All 4 chests has a chance to contain lvl 100 and will at the very least contain lvl 20s.
First tier wins early on since you level fast enough with its exp efficiency. Thus you can farm more manyus in total. However, later on you will take so long time that it is no longer very efficient and thus the third tier garden wins since it gives a great deal of exp and you want to farm the 12-? maps for a chance at ampys.