Welcome @DakiMana !
Advice for Ambush games is a little difficult. You can have a solid list and good tactics, but with so few units on the table, a single roll can determine a game, and some units (such as the Elohi) can be really hard to deal with if they catch a lucky break early on. With just two games in, my general advice would be to just focus on learning with what you have. Thankfully, smaller games can be played pretty quick, so hopefully your get some more experience soon! The campaign sounds like a really fun idea.
I think the lists you have will work just fine for learning the game a bit better. I might suggest that you consider a few things though:
- Combining the Abyssal Horsemen into one regiment. Troops are nice… but these are pretty expensive units, and you are paying “extra” for troops. If you run them as a regiment, you’d save 70 points, which if you drop the items from the Guards, is enough to get you some Gargoyles into your 750 list, for example.
- Running some Flamebearers. I have enjoyed regiments of them myself. They have Steady Aim, and a unit or two can roast enemy infantry. They might help you against those pesky Basilean Spearmen!
- Run something besides the Blood Masque as your source of inspiring, if you can free up the points. The Champion is slower but a better fighter, and can get Lightning Bolt if you have some more points free; and the Seductress gives a lot of utility.
I’ve played as the Forces of the Abyss a handful of times. Battle reports can be found here, and there is also a thread on the forum here, where some other forum-goers have offered up their input. My Abyssals have faced-off against my friend’s Brothermark a few times, which might make for interesting reading for you, but I try to run a variety of lists (as well as a variety of armies). Feel free to peruse the reports, and obviously continue to ask here and on FB.
Welcome to the game and to the forum! Best of luck to you in your campaign!