Baldur's Gate : The Sword Coast Chronicles : NWN2 Persistent World

Just thinking what would be the best spell focus for DC sorcerer,

I'm thinking Evocation and Abjuration ?

Why would abjuration do you any good?

Even evocation is so-so. Necromancy is the best DC school. Spells that do damage, while having a DC, are not usually that good because every other class will do more damage than you even if your enemies fail the saves. It's better to disable or kill with the DC spells. As such, necromancy, but also enchantment, illusion, conjuration and such work.

If you're a sorcerer, you know what spells you will pick anyway. Best get spell focuses for the schools that you will pick good spells from.

True, looks like will go Conjuration

My most used spells on a DC sorcerer:

1. Greater Fireburst
2. Flaming Arrow
3. Wail of Banshee
4. Sunburst

So, I'd say evocation is very much worth it.