This is a pretty cool interaction between items. I definitely recommend this for people who like playing around with item and skill interactions. Damage, survivability and playstyle are all there.
Summary
We spam wandering spirits, but scale their ignite on hit and ignore their poison damage. We use reaper form and spell leech to stay alive and hungering souls to melt bosses.
Key skills
Wandering spirits - ranged, indestructible, applying ignites at distance
Reaper Form - good mobility and doubles your health pool, plus boost to spell leech, damage and defences. With all our regen and leech we are almost always in reaper form.
Hungering Souls - crappy targetting, but at close range, this is your boss melter. I just took the standard fire nodes and damage over time nodes.
Other skills
I use reap and transplant for AOE on mobs, mobility and superb life regen, with a bit of mana regen, then I use blood golems for even more life regen
Key Items
Torch of the Pontifex
Soulfire
The Invokers scorching grasp
Maehlins Hubris - turns all bleed chance into ignite chance
Other items
Calamity - nice buff to hungering souls damage
Woven flesh - nice buff to spell leech
Passives
Lich for the spell leech. Take Vitality, intelligence, spell damage and spell leech nodes, as well as Lich passives for bleed chance and damage over time.
Some numbers
I have crappy gear, level 61, and crappy idols, but this will have to do as I rarely grind far into endgame.
Life = 900. Almost permanent reaper form and so far not getting taken out of it by any monster damage, but only at low monoliths.
Ignite damage = 188
Ignite chance = 290%
Hungering souls tooltip damage = 18K per soul
Leeching about 25% of damage on hit, 15% of all damage.
No shown in tooltips
- extra 120% ignite chance from bleed chance (via Maehlins Hubris)
- extra 160% ignite chance from soulfire
- cremation damage from torch of the pontifex
- All the poison and ignite damage from the wandering spirits
- large buffs to damage from being in reaper form longer
Other things to test
- Aura of decay for the bleed chance there and more poison
- various allocations of points in hungering souls - the 3 minion option should give much higher damage.