Seed Vault: it is one of those in between GB´s – If you play dayli and AID a lot then it might pay off, but it is so so
(I have one which I consider taking down)
Not sure about so-so, it looks like 4 to 5 of WWs of production right off the bat. Not sure about whether investing in it further is worth it, but I will push it a tad further over level 1. At least it grants a spink a day, this adds some (indirect) output to its primary effect. Me happy with my SV, and don't forget about it producing diamonds (sometimes). At least you marked it "to consider", and yes it should fit your playstyle, or you have other reasons that urge you to build it.
Collosseum: Works if build very early on, else it is way too big for later Eras and might very likely be a GB that a player will delete later on.
Really? 10 medals a day from 42 space (lv1)? Maybe if you really need those medals and you somehow still sit in bronze - but bronze limits you on space by a mile, sparing 42 for this feels greatly inefficient.
Not sure about StM, but once you have a hundred of SoKs, it provides a huge coin boos
I don't particularly like Jade relics
Yep really, they are too rare to bother hunting, and you get all the stuff they drop while hunting for golden FP relics anyway.
Not until you've unlocked all diamond expansions and are sitting at 15,000 diamonds without knowing how to spend them.
Gimme 15k diamonds for a new world, then I flood this topic for a set of Arc BPs and buy out goods with them, and place a very own Arc while everyone would still climb up PE! Or lower. Sadly, collecting this much would take the majority of several years, spending them for other activities mupight be better. (PS me sitting on 2400d, considering buying me expansion and mising ToR BP(s) for P)