Greenskins campaigns are super intense

I'm currently playing as the Bloody Handz on VH/N/H, and it has been a super intense one. I broke the truce with Grimgor, and went straight for black craag after I united the starting province, and managed to beat and confederate him at turn 19. Those savage orc boys are absurdly good in the early game.

After nailing Grimgor, I declared a waagh on Karaz-a-Karak, and managed to push Thorgrim out of the Badlands by around turn 40. I had some super intense fights with them as you cans ee from the screenshots. Now it's around turn 70, and I've eradicated Thorgrim/Grombi (they migrated to Karak Hirn), and knocked out the border princes.

However there are some issues I'm running into. My current borders arevery insecure, and I can easily end up with a war from four sides. As you can see from the map, I've got Clan Mors to the South (rank 5), Eshin to the East (rank 6), Reikland north (rank 3), and Angrund + Skryre (rank 4) to the west. I've got non-aggression pacts with Mors and Eshin, but I'm afraid of letting them grow any further. I'm rank 9, so I need the advantage of being the aggressor. Plus I want K8P.

I also find that I get tons of pyrrhic victories with high losses as greenskins. It could be that I'm just not too familiar with their playstyle, but I find that most units tend to suffer pretty high losses even when winning.

What are some of your tips for greenskins campaigns? What are some of your favourite army comps? I find diplomacy particularly difficult, since everyone's hostile (although I know the truce-breaking didn't help).