@softly explorer I'm sure we'll eventually running out of blue bottles. However I feel it's probably not part of the intentional design. That they're buying us time to building up blue buffs from the city. I'd like to point out that I would need to obtain and construct:
App. 700% defence buffs, which means:
100x greater ritual flames (400w/<8 years GE5 without getting rickrolled once)
58+ ritual flames lvl2
116+ watchfires lvl2
46+ serpent spikes (184w / <4 years GE5 without getting rickrolled once)
29+ phantom towers (even if I had 2x key masters it would've taken years or serious money)
21+ bear mountains (where to keeping so many bears, while maintaining the city to be functional?)
25x abbey of Athlon (where to get so many)
Lvl 1.350 st. Bas. (the highest lvl a GB has nowadays just barely exceeds lvl200, how am I supposed to push so hard on this while neglecting everything else?)
To be fair the timeframes are ignoring all other options. Still though without watchfires being offered as a daily special during one of the 99.999.999.999.999 events each year we get, it's pretty though to get there. The point however is that we definitely need either a event building that produces fairly efficiently blue bottles of 20% or more, or we need a super efficient blue buff event building. Even though most event buildings nowadays have blue buffs, they're probably not gonna cut it.
Lastly I'd like to point out that GE5 is getting slightly devalued by the way avatars are handed out. Those who like them might find it frustratingly difficult to get them. While those who don't care feel they're getting rickrolled when they get them. So, nobody's happy. As I've pointed out before, a better approach would've been handing them out as an additional reward for either completing GE5 or as a additional reward for completing the 4th, 8th, 12th and 16th GE5 encounter. Which each having their own specific and unique avatar pool. Alternatively to deflate the value of all GE5 avatars handing out randomly GE5 avatars as an additional reward for completing the entire level.