My main problem was the constant raids until I enlisted the Dunqul Mercenaries and sent in the army in 3148 Achet. At least the raiders targeted a different group of nobles each visit; no nobles got so unhappy that they left.
I used overseers to mine gold, emeralds and tin. The gold and emerald mines worked well, but the tin didn't. An overseer would go to the tin mine but the labourers didn't - they were all hauling limestone to the pyramid. I'm not sure whether this was caused by the distance to the tin mine, or not enough labourers.
I completed the treaty with Sumaria in 1335 Achet, and then the Port of Punt in 1335 Peret (I kept playing after the win screen).