I wanted to get the item [Gilded Shoulder-Shields]; i searched online and the only way to unlock the trasmog is to kill the final bosses in the Adamant Vaults, and the shoulders have a very low drop chance.
I’ve done it once and sadly i only got anima, but my question is: can i “spam” the Adamant Vaults back to back untill i get them? Or do i have to wait next week?
I believe you may indeed do the adamant vaults as many times as you want for a chance at rewards. I personally got a conduit upgrade on my first run and then nothing for two subsequent runs and then I received a pet on my fourth run. It appears are not guaranteed to receive a reward upon completing a run, and thus you may need to do several runs to gain anything. The drop rates appear to be rather low.