Let's simplify things a bit. Say there are a total of 15 chests. 5 large chests are 2000G/1500EXP, and 10 small chests are 1000G/500EXP.

Now let's say your goal is to gether 10000G from the chests. To the extreme there are two choices:

Cash 5 large chests, rest EXP: You get 10000G + 5000 EXP.

Cash 10 small chests, rest EXP: You get 10000G + 7500 EXP.

You see the difference, right? So generally speaking, when you are looking forward a balanced Cash & Exp distribution amont chests,

**cash the smaller ones (1000/500) and take the EXP for the larger ones (2000/1500)**. You'll get more out of them this way.