Here's my Tharbad campaign, after having completed my victory conditions
Took Swanfleet and Threeways as soon as possible, and sent a small army to capture Limfalas within the first couple of years. Dunland spent the whole campaign fighting Rohan to a stalemate around Dol Baran, they have way too many armies doing nothing for 2 decades or so close to my borders. Adun didn't try to retake Threeways and while they were busy I captured Taurdal, Lastbridge and Ettendale, gifted all to RK and focused on capturing the minor Minhiriath towns. With my Northern border secure, I sent an expedition to capture Andrast, and got lucky with Erindol too which had revolted from the Dunledings. After that I slowed, built constantly and bought Thoronburg Keep from RK to create a chokepoint down there in case of betrayal. In the last few years, the Beornings invaded Eriador through High Pass and took Lastbridge from RK. Bad decision, as Rohan was able to sweep them from the south and soon afterwards Dale decided to eliminated them, so the Vales were drowned in Beorning blood and I managed to buy Lastbridge and High Pass off them for a discount getting control of the Eastern gateway to Eriador too.
East of the MM, Rhovanion did well for a time but crumbled when Rhun and Dale combined to attack them. Rohan took advantage of Adun's losing wa to RK in the south and advanced into Wilderland, taking territory from Rhun and Beornings. Dale is the thug of the area, they did Rhovanion, Dorwinion and NR one after another, and will destroy the sons of Beorn next, while they begun sending stacks through Angmar to Eriador, kicking the ass of the sorry remnants of Adunabar at the northern wastelands. I'm probably next, as they are massing armies around Oldford.
Rhun slowly crumbled Rhov and Adun from the east, but lost a lot of ground when they faced RK in Mordor and the RK/Rohan coalition north of the Black Land. They managed to stamp Khand and horde-ify them, which may have serious consequenses in the southern wars in the next decades.
FH had made a league with Khand and Harondor and pressured the Serpents from all sides, slicing towns off them left and right; The greatest beneficiaries of the League were the Princes of Harnen, who firstly cut Harad in 2 taking Ur and Achas Annabon, and afterwards marched towards the sea, conquering through red Banners all the way to Umbar. Due to their unabated ambition though didn't stop there. Being the new superfaction of the South and enjoying a peaceful border at Poros, they turned rogue against Khand which was reeling from Rhun's ackstabbing and took the Eastern Haradrim regions, controlling their initial areas, plus the starting Harad territories except from Caranbad, the last bastion of the Haradrim.
Overall, it was nice seeing the AI factions wage war on each other, but I wasn't attacked by almost anyone after the first scuffles with Adunabar, which was a quite disappointing