I know how addicting it is to gather Kutas or/and even raw mats, I am sucked into it as well and I spent hours in doing it. But here is something different. Hew's Bane is not just good for Kutas and raw mats, rather it boast a city where assassination can earn gold.
Put points on the necessary skills to make it easier. I have points in Ledgerman, Thieves Guild, and even Dark Brotherhood to make yourself less visibly to get caught.
The video show from start to finish, while finishing where you started. So you can keep doing rotations until you have enough items for the ledger.
You can either loot all or loot only green and blue for more gold but takes more time.
The only downside to this is you can only do it once a day because of the ledger cap. But one of the skill ( I forgot which one and I am too lazy to look), it increases the cap.
https://www.youtube.com/watch?v=jZGiZhLfc0M
I missed one kill, it's a lady on the right of the video time of 4:44 - 4:47