Lower leadership with stacking debuffs, in order to maximize losses from morale, and mortal wounds.
Artefacts, Command Traits & Abilities
Our lead banshee will have the Supernatural Horror ability. Not only is it fluffy, but it will double all losses when the opponent fails his morale. The Azyrbane Standard will keep your screening units alive to do their job.
What shines here are your banshees. Their screams are sub par in most instances, but we will use five things to buff these.
1. All enemies in range of standard bearers get -1 Leadership(Ld)
2. The overwhelming horror spell will decrease it by one more.
3. Our allied Screaming Skull catapult will add -2 Ld on wound.
4. The Suffocating Gravetide is yet another source, -1.
Total of -5 Ld. I would not want to be a Khorne berserker near this. But even Ld10 units now take a potentially solid hit from our three banshees.
Also with the Supernatural horror, twice as many will flee when they fail their morale rolls.
The rest of the units are just there to screen. Keep the banshees nearby, but never in melee.
The casket will almost always be doing d6 mortal wounds.
Make sure to focus down units one by one. Stack your debuffs, and keep your screens alive, between your banshees and the enemy.
Magic, Endless & Realm Spells
The fire realm improves the chances of your catapults to wound.
The Black Knights are there to chase objectives and stop flanking charges.