I took a look at the data and found our new ally building. Here is the maxed main reward building (SAT stats):
Arcadian Whisperwood Watermill (lvl 10)
Ally room +1 (type: military; rarity: common)
97,500 happiness
+65% red defense
+97% red defense GBG
276,250 supplies
125 guild goods
27,630 medals
Random chance:
* 276 FP (25%)
* 220 goods of your era (75%)
I want to point out some other interesting things about QI:
Jolly Oink Pigsty B1
5,000 QI supplies at start
[and other normal stuff]
Ascended Jolly Oink Pigsty
20,000 QI supplies at start
+4% QI supply production
[and other normal stuff]
Royal Carriage
5,000 QI coins at start
[and other normal stuff]
Ascended Royal Carriage
20,000 QI coins at start
+4% QI coins production
[and other normal stuff]
Imperial Skyletter Spire (this should be the gold league building)
+25% blue attack QI
175 FP
375 previous era goods
20 fragments of the selection kit for the main building
[and other normal stuff]
Escutcheon Estate
+5 QI actions per collection
+10 QI goods at start of the incursion
+5 QI units at start of the incursion
[and other normal stuff]