Ok,
1. I used the BEST possible alternatives, as they created the worst case scenario for the Float by comparison. If you use anything less than those, it puts the Float in better light. (I actually ran those numbers before looking up the in-chapter best alternative options in elvenarchitect)
2. the 85 quests were done in both my Amuni cities after about 3 1/2 days, which did require preparation, planning, and some “focused and intent effort” but far, far from 4 weeks worth. But, that’s just my experience.
3. sure, the 7 artifacts now (and likely 2 more in the next FA) *could* be replaced with 9 fully evolved FireChickens, Magical workshops, or Genies....but I tried to analyze what exists in the game, not in somebody else’s imagination.
4. Since this (or anything else, for that matter) will not be a comparatively monster producer 2-3 chapters down the road, it should just be dismissed as not being worthwhile. I guess nothing can ever be useful now, and disposed of and replaced If/when it becomes obsolete......
bottom line (as the math dictates anyway), this Float is notably more efficient for the pop/mana/seeds combination than anything else that is currently available, and all 3 of those are “need” items. The extra 1-3 AW-KPs are a nice bonus.