Well we can nit pick all day, but lets look at this from the whole picture.

zenith takes a couple hours
Atma takes about 4 hours
novus takes a couple days
nexus takes a couple day
Zodiac is an exception as its a new weapon - took me about a week and 1/2
zeta takes 2 days

Now animus.. im on day 4 of pretty consistant grinding and still have 4 books to go. at this rate it will take me another 3 days for a total of a week

to get animus completed you need:
4500 Soldiery
27 dungeons
27 (still semi long wait timed) FATES
27 Leve quests that tend to be buried under other leves
900 mobs.. NINE HUNDRED!!!!

Now, looking at it from that perspective, with all the other relics and how long they take, and with Heavenward only 2 months away, this kind or a grind for a level 100 weapon is just obsurd in my opinion