This. None of the shop crafted items should be purchased by a knowledgeable player, ever. Who says so? Math, that’s who.
If you are a higher level, World Energy flasks will give you far more materials overall and are a better value if you must purchase something. And now with Atlantis Rising, even more so.
Those 400 gems (200 minor healing pots offer) will get you 100 minor healing pots (for ~20k food after the farming reward), almost 400 recruits, and dozens of other kinds of other better goodies if you purchase flasks instead and auto-play S1 8-7. This is assuming ~36 world energy. During Atlantis Rising, you’ll get even more not to mention ~100 backpacks!
Edit: Is Atlantis Rising this week or next? Wasn’t sure with June 30 falling on a Sunday. Forgot the event timer rules. Thursday before the last weekend of the month?