(( Howdy Gigataur,
I suppose that means you're bigger than a "Taur" and a "Mega-Taur"... sorry, lame Disgaea reference in there.
Anyway, just some quick thoughts.
1) Skaven have a lot of screwy rules and erratas... so... they can be very difficult to play against and plan against.
1-A) Compounding this issue is that they can get easy-LD via their ranks... so... trying to rely on them having a Low LD isn't terribly reliable.
1-B) Not to mention that, if the Slaves break, they EXPLODE all over the place... basically giving the Skaven Player "Death Spasm" hits.
1-B-1) If you can, get the slaves to Panic / Blow-up away from your guys, so all the fleeing slaves will run over other Skaven units.
2) Currently, your army is around the 7 - 8 LD range. Which... is not terribly reliable, without a BSB. You might want to foregoe a full Demigryph, in order to free up some points for an el-cheapo BSB. The ability to re-roll ALL LD rolls is huge. You'll still need to pull some points from elsewhere too, though.
3) Death-lore is more of a character killer to me. I'm... not impressed with it as a whole. It doesn't tend to synergize well with the rest of the Empire armies.
3-A) You might be better served with a low-level Fire mage over Death. Fireball is a fantastic spell, and the Flaming Sword of Ruin augment can really put a hurt on Skaven. Burning Head, Piercing Bolts, and Flame Cage can really chew into the large, Skaven blocks.
3-B) You might be able to save a few points, and drop the Opal Amulet. If your wizards are using the Archer escort-bodyguard, they shouldn't be terribly easy to target. That'll free up additional points for a BSB.
3-B-1) I'd move the Dispell Scroll to your lower-level mage. If your Higher-Level mage fails a dispel, he cannot attempt for the rest of the turn... and thus he can't use the Scroll. Where-as, if he fails, your lower-level wizard can still try to dispel, or just use the scroll.
3-C) I'm also not terribly impressed with Life. It does synergize with your List, via Lifebloom on the tank and demigryphs, but... without Throne of Vines, the rest of the spells cannot self-augment, and are on the weaker-side, for how much the cost to cast.
3-C-1) The Lores I tend to use, regardless of opponent, are Fire, Shadow, and Heavens... if you remember Magic The Gathering, I always did like me some Blue-Black... so... hence the Shadow and Heavens. In Warhammer, I just love me some Fire. Fire burns. Fire cleanses. Nothing says loving like some red-hot fire. Um... anyway.
4) At lower-level points, you might be able to get away with non-Inner Circle knights. The points you free up are almost enough to upsize the knights from 5 to 6. You do lose some punch with the lower strength, but you do increase the volume of attacks you can bring to bear... which gives you the chance to cause more wounds.
5) Overall, Disruption destroys Skaven. Disruption takes out Rank bonuses, and, thusly, should take out Rank-to-LD bonuses as well. In order to get Disruption, you need to hit a Skaven flank / rear with a unit size of 10+
Anyway, just some quick thoughts. Unfortunately, I normally lose to Skaven... as their not-balanced rules just, eventually, overwhelm the Main Rule Book. At least, that's been the preponderance of my experience playing against them. ))