[tinkthank]

These are all great tips and advice, and I wont repeat this. Odd however because these are not the first things that pop into my head about Abysia, which I like to play. But that's the great thing about DomII.
Obviously, Abysia is a fire race, but I dont play it with strong fire casting. I love its Astral, and its blood.
I often go with an Oracle, a Divine Glyph, or a Phoenix or a Virtue. (On the virtue I slap a fire ring on round 1.) I want Air 4 on my pretender for the bless effect, and I want to be able to forge +air items in case I get a random on my warlocks, which I get a lot of asap, and to forge a staff of storms. Staff of storms is key for me. Abysia doesnt use projectile weapons, and I try to make sure my enemies cant either. Keep those storms coming. So I invest in Construction quite a bit too. Construction will also get you those contracts (btw: its a blood 5 req for Soul Contract, which you get at Constuct 2).
Thaumaturgy is key for me too. I prefer Communion to Sabath master/slave. I love warlocks for mind burn, then soul slay, paralyze, and then later of course mind control. And the most important for me: Gateway. Notice how Abysias great troops are so damn slow? I hate toting them around, so I gateway them with my warlocks.
I like Blood for Send Horrors, which is great. Thats almost about all I use it for, with the occasional summon Storm Demon, Succubus, and Horde. I dont care for the rest of the summons as much as other people do, but thats a style thing again. Do what you like.
Then I invest in some conjuration and some evocation as time permits. Enchantment and Alteration as time permits.
Well thats just a few quick tips from my perspective, which is of course very different from what other like (and what they said here is all good, true stuff), and hopefully different from yours too. Enjoy!