Yeah, unfortunately I haven't had time to solidify. I was hopeful that I would, but Marverni turned out to be too nearby, and shrewdly built a fort in a key province before I had a chance to invade. As a result, I've been sending rag-tag armies of 7-10 soldiers around trying to stop his army of elephants, but it's a losing battle because of the cost. Even if I miraculously survive (if my Pretender ends up being strong enough to take him single-handedly), I'm going to be gimped because I've had to alchemize so many of my fire gems just to afford enough troops to hold off a full-scale invasion.
It also hasn't helped that my capital province only has three land provinces adjacent to it. Abysia's units cost not just a lot of gold, but A LOT of resources, and I haven't been able to secure enough.
In the end, Abysia is a really strong nation if you can grab some high-income provinces and turtle until the mid-to-late game, but my metaphorical turtle's shell didn't have enough time to grow. In retrospect, I should have been way more aggressive about bidding on mercenaries early on so I could have expanded quicker, but I guess that's why I'm still a Dominions newbie. Losing is the best way to learn, after all.