Sorrow’s Furnace ~ Gielinor ~ Gullwings ~ Proudmoore ~ Forcelia ~ Cinna
Level 80 armor.
I’ve been using the Heavy Archon set from the temple of zephyrs chain (Otherwise known as the temple of dwayna chain in Malchor’s Leap). It’s probably the easiest of the karma merchants to spawn after only two escorts and two fights. Each piece is 42k karma, is exotic, and comes with a superior ‘of Dwayna’ rune which buff healing power and grant healing abilities.
The stats are a bit all over th place though. Personally, I like a more generalist approach that focuses on healing, so the medly of stats from this set suits my play style. However, you may want to shop around all the Orrian chains to get a set right for you. All the art is the same and the runes can be changed.