"No brainers"
- EE, PT, ToS. Each of them are better than workshops at level 1(with extremely rare exceptions like making bread 24/7, only collecting from PT once a day, and 72H+ scout times)
- Shrewdly shrooms- this building is an absolute must have if you want to use military. Even at level 1 it's better than a third armory, and it takes up zero pop.
- Dwarven bulwark-generally KP invested in the shrewdly is better than the dwarven bulwark, but you might unlock the bulwark months earlier which makes this a great wonder until then, and if you level it, it's not worth deleting.
- Needles-again, only military, but most troops come from barracks, and once you reach a point where your barracks level is always at max, then the only way to get more troops is this wonder(or crafting)
- Monastery/sanctuary after the shrewdly this is hands down the best military wonder. The only way to gain an advantage over the enemy in tournaments is to have buffed troops, and this is the only wonder that buffs all of them.
- Mountain halls- any build that has at least 6 factories is better off building a MThall than building a 7th factory. The more factories the better it is, and that's not even counting the pop it gives you.
- Golden abyss-as mentioned above, once this gives better pop per square than a house (around chapter 5/6) it's an obvious win.
Special mention
- Dragon abbey-a really cool wonder where you can get instant mana by spamming spells. The problem is that crafting might get better and better and the CC spell doesn't give mana. Also, you need to run your magic academy pretty much 24/7 to build up enough spells to make it useful meaning a greater commitment to the tournament for needed relics. Finally, you can't really use this as your only mana source and use spells often( like constant PoP or MM)
- All other military wonders. If you get heavy into the tournaments, then you'll want to start adding in either the wonders that shore up your weak spots (human heavy ranged+toads) or doubles down on your strengths (dogs+victory springs) as space allows.
- Elvenar trade center- good for getting needed seeds in elementals, but much less needed in Amuni...but the boost to MM is quite powerful, so I'd say it's playstyle dependent.
The absolute worst wonders are imo:
- Maze/Enars-every event offers a building that is far far better per square at mana production.
- Thrones- not terrible for culture, but every KP invested would better be spent elsewhere.
- Blooming trader- if you win 1 trading post per event you are better off than having a level 11 BTG. And you save 17 squares. No, the wholesale reduction isn't great, go buy KP instead
- Pyramid-craft a vallorian vallor or 2 instead, his needs to be level 9 or 13 to be better per square.
- LoGN- very niche wonder with a fatal flaw: you need buffs on mana buildings which generally arent your best culture buildings. If someone has a strategy where this wonder makes sense, I'd love to hear it.
- Sunset towers- this wonder comes far too late to be of any use. The need for seeds drops dramatically in Amuni, so if there isn't a massive increase in seed requirements for chapter 14 it's a rather pointless wonder.
Then come the other culture wonders. If you like the super efficient culture&pop hybrids from events and get about 30-40%+ of your pop from them, then you will have no need for pure culture buildings in your city meaning the watch tower and lighthouse combo has no value as you won't need any culture buffs to hit 150% bonus- this is an especially effective strategy for players in more casual FS where they can't count on a lot of visits as they will see a better return after about 20-30% pop from hybrids.
If, for some reason, you don't do events, or choose other event buildings than the hybrids, then YMMV.
A quick note about the "build them all" strategy: it's true that every wonder is better than not having it(ignoring space efficiency), but if you build them all then you will largely have luck dictate which ones you can level up.
Without some skipped wonders like the lighthouse or thrones that you can use to smash runes and fill wanted wonders, you need a combination of luck, patience or diamonds to get the runes you need.