The endgame item of Realm is ovbiously a 100/100/100 pet, preferably of heal/mheal/electric. But how much does it cost?
With a bit of fiddling on google sheets,
you need:
28 common humanoid eggs (on average) for that h/m/e
7242 [400 FP items] (worth about 2 def each if you want them fast)
3831700 fame
or:
(7900002+915000)/5000 = 499 ambrosias [most efficient]
ambrosia discount pack+158602+183150+1800+150+400+1200+2000=401960
401960=2516000+1960<$25100>+<$20>=<$2520>
edit: I hear rolling the mystery can lower costs by a small fraction.
I have not taken into account on gold costs to buy 28 legendary eggs, or 28 rare eggs + fp, or 28 uncommon eggs+fp or 28 common eggs + fp …
If you are spending this much money, DECA should just hand you an h/m/e legendary on your first egg open, otherwise we will have to pay even more.
If you find an error, please tell me!