On the topic of the bakemono-sho, I recently saw a short video by a player advocating a bakemono-centric strategy for Yomi: https://youtu.be/91QAQT6qcEE
That player managed to put 750 goblins on the field by turn 12. I understand his thesis was essentially that this technique was so overwhelmingly strong it could be used to win early wars as Yomi and make up for the nation's economic disadvantages.
The approach somewhat feels like a one-trick pony to me; notably, the strategy is hard-countered by certain specific units (Abysian burning ones have high protection and AoE damage, for example; magma kids would likely fare alright, but would suffer heavy attrition) or by SCs who can ignore an arbitrary number of yari hits (not an easy thing at all in the early game - those things hit for 19 piercing damage with SoG). Still, the pony is strong and it is barded with 750 yaris, so maybe those flaws are acceptable.
Something to keep in mind at the end of the day is that when the best elements of a nation are trying to pull it into two different directions that don't mix, it is usually a not very good nation, unless those elements are extraordinarily good on their own.
Strong nations, on the other hand, offer different elements that work together and add cumulative conditions an opponent has to clear when making decisions, until they are down to virtually wild guessing on whether the counters in any given conflict will work or backfire
Said bakemono rush would get flattened by a great many things, between awake pretenders and nations with a better rush. And if it does work you are then highly likely to earn a gank.
That at the cost of having recruited virtually no mage for the first twelve turns.
It's neat that it also avoids the weakness to order scales and the need for many temples (and it makes growth scales more attractive). I think if I were playing more optimally I would've recruited many more goblins early, but for my first multiplayer game I didn't want to play aggressively.
Abyssia seems like just such a horrible match for Yomi, even with cold scales. I'm not sure I can imagine a valid counter... the only thing that comes to mind is Rigor Mortis, with all the problems that would come with that.
You are probably overrating EA Abyssia a lot there. It is really overspecialized. What is worse, it is specialized in a bad element. Its only saving grace is it can go blood, and that blood can borderline make up for the lack of path diversity.
For instance, the Burning Ones are capital-only sacreds with a very high price tag, and the AoE in question is fire shield, which becomes nearly useless when a little weapon length and protection enter the equation. More so, the heat auras on most of Abyssia's units are small enough that temperature scales can outright stamp them out.
It can finance holy scourge spam like no other nation, but that is it.