Hobbled builders
I agree that it depends on your priorities ( Food/ Iron/ Recruits, etc. ).
But my #1 priority is Stronghold since it is more efficient to upgrade multiple farms, mines, house, etc, then to upgrade a single one to max level.
It is one of the reasons Advanced Farm/ Advanced Mine/ Advanced House makes me angry. Throw in an artificial cap on Stronghold, and I was not thrilled with the direction Devs took with the Stronghold upgrade.
So whenever Stronghold 24 is unlocked, it will be my priority since it will unlock all the current production, and storage, buildings.
Stronghold 25
I am slightly worried by the trend of Lodge to require max level, multiple buildings to access parts of the game.
Stronghold 25 worries me.
Priorities
If you are always out of food, and iron, concentrate on Advanced Mine, Advanced Iron Storage, Advanced Food Storage, and Advanced Farm.
Lower level Advanced Buildings cost less in resources, and time, but the second set are not available until Stronghold 22 ( see rant above ).
My priorities
For example, Since I never have enough iron, once I unlock Stronghold 22, I will stop leveling my current buildings and concentrate on Advance Mine “B”, and Advanced Iron Storage “B”.
For many reasons, I stopped Advanced Iron Storage “A” at Level 8 ( Stronghold 21 cap was not Wanted Mission Chest friendly ) and Advanced Mine “A” at Level 10 ( I had a food hoard I could use ).
I would have preferred to level two Advanced Iron Storage to 5, and two Advanced Advanced Mines to 5, but the hobbled roll out of Stronghold made my upgrade path weird.
Stronghold 23
It looks like Level 8+ Level 1 gives you 2444k Iron capacity, enough for Stronghold 23.
But I agree with @zephyr1, If you are not planning on the Alchemy Lab, then you do not need Stronghold 23 since Stronghold 22 unlocks the next set of Advanced Mine, Advanced Iron Storage, Advanced Food Storage, and Advanced Farm.
Notes
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