Farming Efficiency?

For late-game players what is the most efficient way of re-maxing 6/8 in all stats except for GMANA and GLIFE? In yall's opinion, what is the most efficient way to re-max? It can either be g-land farming on a certain class, trading, or whatever you do. I try selling my extra GLIFE/GMANA pots for rainbows, but I am curious to see what you guys do.