Aint no new one yet. Good, im stuck in battles of attrition vs Lizardmen
to in our campaign here..beurk

.
Btw, dont forget outnumber= Static CR is 5!
I dont know, Lizardmen can be surprissing, but all in all, their
units scatter quick. Good hitter units that charge, smash trough those lines
in no time. Again, Wraiths and banshee are sublime.
So is all types of cavalry, and huge chunks of wights.
All your core stands good chances of performing as they should, Ghouls slightly less due their lack of armour, and in my experience the amount of poisonous darts can really cripple them..badly.
Its as bebopasorus said, large block and well suppoprted, and small elite units
are what you need to break those lines with ease.
Of course..with a Slan in play, things change drasticly, they can really shut your magic of and cast unchecked if you dont take precautions.
Against a Slann, I propose take a pair of scrolls along, corpse carts with Balefire(At least two!), Forget the Wight king and go all out for Vampires and make certain your Lord is at least a Level 3.This way guarantees most disspel die, Slan magic is to tough to ignore.
Against their magic, dont bunch your characters up, nor your important units to much, Make sure you're up to the task to fill huge holes appearing in your rank and file formations. Well, If you're not cursed with bad luck, nor your opponent with to much good, you should with this be able to contain most of his magic, and overcome his units rather swiftly.
And with two Viasmas that may go of, 4 casters perhaps..you'll be able to get sufficient spells of in your own magic phase. If not, cast some more IoN with the characters who hold the appropriate abilities. Good luck!