Remember....."He who defends everything, defends....Nothing".... You have weight of numbers & DreadLords...put them to good use....
Killer Stacks...
1. multiple FM's in stacks...Dread up front.
2. use fire, keep minimal archers, three or four.
3. SPREAD formation....
4. Close on them fast....
5. Always hit the flanks
6. KILL the enemy General quick-like.
7. If your gonna lose the settlement , fine. Save your FM and make them pay for the settlement in Orc Blood...make them beat your hole full of javlins orcs.
8. Use your javlins, their priceless ....and the Life's blood of the Orc.
Two or three "Killer Stacks" with resupply/fodder stacks will serve you best...