Signet of resolve and the trait "purity"
I saw another thread on this subject recently. From my understanding, they stack and work independently of one another. The 10 second timer activates once you enter combat, so every 10 seconds you would have two conditions removed unless you activate the signet.
Yea they work together, I run them both and routinely see (when fighting nasties in Orr that stack a ton of conditions on you) two removed at a time together.
I never saw the importance of condition removal when playing in lower level areas. Now that I finally started fighting harder mobs, conditions can hurt, so it’s always nice to have an auto/passive removal handy and not have to take up utility slots for this.