DG1: Move forward to within 1" of the Executioners so they cannot wheel past.
Steam Tank: Rumble towards the Spearmen and blast them with the steam gun.
ICK: Move forward, staying 14" away from the Spearmen bus. Rearrange characters in the unit so that the Lord cannot be in base contact with either Huss or the BSB. If Lord is in the center of the Spearmen, move Huss and BSB to the edges of ICK. If he is on one side or the other, move Huss and BSB to the opposite side of ICK.
Reiksguard: Charge Shades, redirect into Hydra if (when) they flee.
DG2: Charge Hydra.
Kn2: Charge Harpies, redirect to shades (if visible)
Other considerations:
Magic: key spells are 5+ ward on the ICK, flaming attacks on the Reiksguard, and Iceshard the Spearmen.
Shooting: Steam gun on Spearmen, HBVG on the Dark Riders to wipe them out.