Check out the fpq guide aswell and start doing ur fpq daily,its an easy way making messo,around 900-1b,and it usually takes hour or bit more,depends on ur party .
Sell ur Perfect Bonus Potential Stamp for at least 400m,start working on ur drop rate gear . Also check out progression guides around here,commerci,gollux every day. Besides that MP can be efficient way earning messo ,but i will suggest first getting ur drop rate gear. Can also farm nx and sell it,cubes,bcubes,and sell vcubes. Vcubes are now 100dp each or 520m~,and they cost 2500rp from Cash Shop.gl