First off, Find a goby house.
Then, Use darksight and stand in the goby house
Drop 1000 mesos 10 times

Then drop 430 mesos 10 times

Step out of the goby house, dispelling darksight and casting booster or Meso Guard if you have it

Use meso explosion ONCE and wait for the gobies to appear (if house fails to break, SB it or Assaulter it and run away before it ohko's you)

When the gobies appear in a clump, explode the remaining mesos on the floor (Skill and Timing required ^^;; )

Thats pretty much it, repeat as neccessary or until you have no meso left to explode.
(this is an adaptation of that meso explosion guide on basil but this way is alot cheaper for the same effects)
Enjoy power-leveling =D