its just i got the worst luck when it comes to turn rare into legendaries specially ancients, guess i got to farm mats for like a week to have enough to may turn 1 or 2 legendaries
What is your current gear level?
Do you have all items in slot as needed, just no ancients?
Or are you mostly Ancient already, just hunting down perfect rolls?
If you're mostly Ancient and you're held up just on the Stash Bag items, use Law of Kulle at Cube. I am not a huge fan of this recipe because it's expensive early on in a Season. Once you've cubed your main items and are mostly Ancient Geared, it becomes viable in your situation: Need 1 or two item's that you can't seem to get a good roll on.
It costs 5 of each of the stash bag materials and 50 forgotten souls. That means you can do it twice for every time you clear all of the bounties in a T10 server (10 materials per act @ T10). But if you're clearing bounties anyways for stash bag items, this is an overall win. I even used this on my Traveler's Pledge and Compass rose as I was having trouble finding well rolled ones.
If there is only a slot or two that you need non-stash bag items for, make sure your Kadala is set to one of the items and your "Upgrade rares to Legendaries" is set to another.
For example, I was trying to get an ancient 1H weapon for my Crusader and I needed an Ancient Nemesis Bracer. I set the "Convert Rare" to 1H Weapons and left it on (Gambling weapons is a complete waste on weapons as they aren't targeted). Then set my Kadala gambling to bracers. In a day I had both.
Anywho, which items do you still need?