Yeah this is my experience as well.
My specifics:
-Daily ventures, focus on a different item every couple weeks until it crashes
-Sell mats off new content (maps, POTD, HOH, EX trials, etc)
-Sell excess gathering mats
-Sell excess potions/food
-Weekly yellow scrips on two characters
As a general rule, never keep/use new items, no matter how much you want them. The value of almost everything in this game goes down the longer it's been the game so you're better off selling that cute minion, cool mount or orchestrion roll when they're new and simply buying them back later. Timing is really important: your earning potential at the beginning of every patch release is crazy and it quickly goes down over time.