Sage: Heavy Support
Grimtools: https://www.grimtools.com/calc/DV9D1rj2
I’ve been obsessing over healer/support builds and trying to make them powerful solo builds with decent damage. I’ve come up with a few so far, and this is one of my favourites 
Enter: Sage, the elementalist. This is a powerful support mage, featuring the full Mythical Apothecary set, 4x mortar traps, 4x storm totems, a whole lot of healing and a whole range of other benefits. Below is a vid of 150-160, which was easy until 160 where I got spike-damaged and died. It shows that the build is incredibly powerful, and even passing some of the difficult waves (154) was a piece of cake. But, the death shows that while healing is fantastic, damage mitigation is a bit lacking - Other sources of damage absorption could have saved this build in this circumstance. Still, I’m very confident that on a second attempt this build could at least clear to 160 solo.
Highest crit on a mortar trap hit so far is 143k, so having four of these plus four storm totems plus whatever other damages you’re dealing all adds up. The best part of the damage though, is the sheer amount of AOE damage it deals. It’s clearly not going to win any single target DPS races, but the difference between single target and AOE damage is very slim, so clearing a room full of enemies (including bosses) takes about as long as it does to kill a single boss in some cases.
Let’s get into the build!
Buffs:
: HP Regen: 584 + 93%
: Energy Regen: 25 + 55%
: Heals: Healing Rain, Apothecary’s Touch, Empyrion’s Touch, Wendigo Totem (+4% lifesteal buff)
: Inspiration: +110 OA and DA
Debuffs:
-100% Elemental RR
-135% lightning RR
-24% reduced damage to enemies
-95 OA
-170 reduced DA to enemies
-27% chance of fumble/impaired aim
Other things to note:
: Low level Primal Bond + Light of Empyrion are primary sources of damage mitigation.
: Eternity relic keeps mortar traps, totems, heals and devotion buffs/debuffs on low cooldown. Also helps with Blast Shield.
: Having 8x ‘turrets’ deployed will allow you to do damage while kiting.
: With all buffs up, you have ~2500 health regen, not including wendigo totem
: Resistances are all overcapped, but only by a little.
: This build has LOW phys resist and armor, so certain enemies will require more kiting than others (Sentinel in particular).
: This build uses a Level 40 ring, because it provides an integral +2 to mortar trap, allowing you to get the fourth mortar trap.
: The green item really just needs physical resist on it, and if possible, more elemental damage.
: On top of all of your heals, Ulzuin’s Wrath and Tip the Scales will also help to keep your health topped up.
The AOE damage of the build is clearly nuts, and this build will provide a decent protective boost to your team while thrashing the room with elemental damage. What fun!
Enjoy~