OK, I have taken some brutal beatings with this force, and I realized that it needed an overarching strategy to go along with its dirty tricks. Silly me for not thinking of that sooner!
And so, the main strategy will be to form a foundation of two warbands of Orcs, mainly with bows, led by Wights.
Wight
4 Orcs with shields
8 Orcs with Bows
These two warbands can link together to perform volley fire, or they can direct fire from behind the cover of the Orc shields in front of them, more or less. If the enemy charges them, the Wights can knock out the enemy heroes while a Shade moves in and makes my Orc troops much better fighters.
Meanwhile, the other two Orc warbands will move up on each flank and attempt to encircle the enemy. The two warbands look like this:
Orc Captain with Shield
1 Orc Specter
4 Orcs with spears
7 Orcs with shields mostly, but a few with 2H weapons
And the last to hit the table is the Shade.
...with the small detail that one of the warbands has shields on its spearmen, because I had four points left over.
And so, my primary strategy will be to use my large number of Orcs to envelop the enemy. Envelopment is a good strategy because trapping models is the most efficient way to kill them. My secondary stratey will be to shoot up the enemy, as 16 bows is a decent amount, and my shooting warbands can be moving at a half-step while my flanking warbands can move at full speed. My tertiary strategy is to incapacitate enemy heroes with the Wights and then gain local superiority of force with the power of the Shade. The Shade is the last to hit the table, as he might serve better on one of the flanks instead of in the middle, depending on the tactical situation. The Orc Specters have always proved very useful with their magic and spectral blades.
Now, to find a live victim, er, opponent!
BdS