I think, in general, the myth tokens are far too expensive resource-wise. Incense is such a difficult resource to get because you need a huge foundation of clay just to build the buildings, and then each one only makes it trickle in. You have to do all of this while focusing on building your military and other stuff, it can easily reach a point where you think "meh, it's easier just to ignore this whole category completely." Especially if the units and tokens can end up being more trouble than they are worth.
Fish/rice seems so weirdly placed here too, since it's not really exotic. It's a 'core' resource that only kinda slipped into being an exotic one because you got rid of the civilians. I almost think fish/rice should be a staple resource for your military in general just like wood/rock are for building out in general. As in, every military unit should require a small amount of it - so building up a giant fish/rice stockpile for myth units than becomes something you naturally head toward rather then getting 40 turns in and thinking "oh I guess I'll start building a bunch of fish/rice now". (Since buildings are no longer captured, what is the point in the distinction between them? Norse don't use horses right? Should they be given a use for them, or should you remove the ability for them to place ranches at all?)
Now, I'm not saying these exotic tokens should be super easy to make, and if we have score gating, maybe managing the buildup to make them in order to get the points is the challenge itself, when you have to deal with buildings being burned down left and right, that can be fun! I'm really speaking from a slightly older version perspective where I felt no motivation to use this category of tokens because it simply wasn't necessary to do well.
Of course, I've never used traders (I always reset my profile because I hate seeing the large number of unfinished games), so maybe that changes the game quite a bit in this regard. I kinda wish we didn't have profile unlocking and you just went with an AI-war type of selection of units (simple/normal/complex). I don't think the game-grinding is very fitting in a game where you can select how easy/difficult you want it to be. It might just encourage players to play on an easier difficulty than they might find actually to be fun just to unlock things (and then get kinda burned out doing that).