Valkyrie or Berserker Ascended Armor
Hold off on the ascended, try a full zerk build in exotics, if you’re a Dungeon guy it’s worth it, trust me, you actually don’t see too big of a difference in survival but a good bit more damage. At most you’re wasting some gold, but in the end it could save you a BUNCH of gold/time if you make the wrong ascended set.
Basically it’s worth the cash to try it for yourself rather than taking someone’s word for it.