@GeorgeH51 The more you make an item, the lower the cost to master it becomes. I've seen other comments say you can get the cost down to as little as 10% of the original mastery cost. So if you want to lower the mastery cost, make as many of the items as you can until the mastery cost is at a point you're comfortable paying.
@tibor89 So at what...boss 7+ there's finally a use for Grim and Tidus? Seems a bit too little too late for two heroes to finally become useful. And if it's only for one boss, that's more of a gimmick than anything good.
@rorschach500 I was having a terrible time as well. I looked through the comments here and I took their advice. In this order I picked: Beorn, Lambug, Caeda, and Grogmar. Finally took down the boss.
Issue about the crawl: Once at the 4th level items/boss, equipment becomes absolutely stupid. Not only are these taking up multiple crafters, they're extremely slow. And as far as I can tell, even after mastering them, their chances of making something better than Common seem to be extremely tiny.
So the only option becomes 'Wait forever for the slow crafting, then spend literal millions in the Fusion Cabin, then wait 12+ hours selling everything you make to try and get more money to repeat the process'.
Suggestion: Have multiple levels of mastery that either decrease the time it takes to craft an item and/or increases the chance for better than Common crafting. Alternatively, after Mastery, we could enable the material cost in exchange for getting one of the two options I mentioned.
This goes with my other comment about Grim: Tidus is like Grim, unusable for Adventures because he kills your own people, unless he's behind Grim, but Grim kills himself. So we have two Heroes that are useless. Something needs to change with these two.
I'm having a hard time seeing why I should ever use Grim. He basically kills himself and that makes him completely useless for Adventures. There must be a way to keep him from doing that otherwise he'll just be left to rot away to dust...or I should be able to get rid of him.
So far, if we could put a maximum ingredient cap on what we buy, I feel like a lot of the storage issues would be fixed.
In regards to the station, if something the kitchen only takes up 2 rooms, why can we not build two of them on one deck?
 "Forge & Fortune"){kind=icon}
 "Kitty Catalyst"){kind=icon}
 "Click for Biscuits"){kind=icon}
 "Defender Idle 2"){kind=icon}
 "Absorber"){kind=icon}