Option #2, for me at least. Agroforestry & lots of foraging, too.
Plus fiber crafts, of course. My cool great-aunt taught me to spin (a little) and crochet and weave.
If you are already using timers and supply instants for troops, this is exactly when you should feed Brownie! His bonus is at collection, not production. Therefore, the more units you collect, the more bonus troops. You create more collections by using timers. As you grow, a bad encounter in the higher provinces might require you to snuggle up and cry it off to Brownie. The loss of troops in one upper province might be more than all the troops lost in the first 15 encounters.
Oh, sure, sure. I do feed Brownie when stockpiling troops. But I played for months without Brownie (2 Bear artifacts in the first 4 months of playing = not worth placing the base) doing troop-heavy hybrid with just a few time boosts a week & very rarely supply boosts. Full spire & 6 rounds of tourney (8-10 provinces most of the time), and my stockpiles of everything on a solid upward trend. Now I do I big stock-up every 3 weeks or so - 1 pet food, 1 or 2 50% supply boosts, & a bunch of time boosts - and then coast.
At lvl 5, he is enough to make a difference fighting Lab section of Spire, though I saved my feeds for later when I started doing more provinces regularly. Once you start feeding him for tourney, you will need several feeds a week. Get hoarding on Pet food in early chaps so you can weather dry spells in MA when Fire Phoenix becomes a drug habit
Definitely agree on hoarding pet food. I do anticipate wanting Fire Phoenix for tourney once I add a few more provinces, but really haven't missed it on the Spire so far. Out of necessity (1 phoenix artifact in the first *5* months!) I developed my battle strategy based on not having Fire Phoenix & have been fighting up into the Lab regularly without tapping out my troops. Some of that includes being picky about what I fight versus negotiate, of course. But there's a lot more to it: troop diversity, troop-producing specialty buildings, limiting squad size upgrades, knowing what 3 weeks' worth of troops looks like, stockpiled troop instants, et cetera.
I don't argue that Fire Phoenix is valuable - not a bit. I do argue that Firebird & Brownie aren't required for several chapters, even for fairly heavy fighters. Definitely not through chapter 5, and I'm estimating ch 6 will still be manageable as well. I'll let you know in a couple months.
There's an overwhelming tendency for longer-term players to recommend Brownie & Firebird as though they are readily available. They are not. Six to nine months is probably the minimum time to get them IF you get lucky. That makes a lot of the Brownie/Firebird-related strategies that longer-term players offer frustrating and even invalid for <1 year players.
I don’t see Pilgrim’s Manor on many lists. This building makes mad amounts of goods and is very versatile for events and FA.
OP asked about evolving buildings specifically, not sets. I love my Pilgrim's Set. If we're including sets, my list would be:
1) Polar Bear - any stage; any chapter
2) 3-way tie:
Pilgrim's Manor
Moonstone
Triumph of the Tides - stage 4+; chapter variable (different goods produced)
3) Misc. fully-evolved buildings (mostly goods-producing ones)
4) Brownie - stage 5 and up; current chapter
5) Fire Phoenix - ?? Not inspiring at stage 5, so probably stage 7+; current chapter.