I think most players putter about during events.
Interesting, I've found most players go all out for events. Regardless, getting enough FF to replace enar's would require less than half of the currency awarded in this event, so even putterers could get it, and in this event format prizes are guaranteed.
Edit: after crunching the numbers below I remembered that mana sawmills exist: using 3.5 of those gives similar results, so events aren't even needed to make Enar's obsolete rather quickly.
I also think a lot of players have written [Enar's] off because it's not a troop booster.
I think it's purely by numbers. The prosperity towers, GA, and BTG are also non-military wonders and yet staples in almost every advanced city.
Although I will admit that fighters having a Dragon Abbey that is better in every possible way does put yet another nail in Enar's coffin.
I think it's useful for more than 2 chapters...I have not crunched the numbers by chapter. Has anyone?
Well, it's about tied with Frozen fountains for you now in chapter 11, BUT you've already spent hundreds of KP on it.
For chapter 12 the frozen fountains get a 32% increase in production, so to keep Enar's relevant you'd need to sink another 800 KP into it.
For chapter 13 the frozen fountains get a 34% increase in production, so another 1400 KP into it on top of the 800
For chapter 14 the frozen fountains get a 31% increase in production, for over 4,000 KP total investment.
****The assumption for the above is maintaining 1 scout per day, every day, which of course becomes impossible later.****
Also, we can't forget that every AW level has a negative impact on your tournament and spire costs for
every single resource used, not just mana, so once you max out Enar's at level 30 or 35 your mana, seeds, coin, supply, and all other goods costs increases by about 5%, which is a pretty huge impact.