The main idea here is to infect your enemies with as many arrows of health degerneration as possible. With this build, you should be able to inflict disease, bleeding, weakness, and an extra 2-4 arrows of health degeneration at once on a whole group of enemies. The main problem seems to be energy availability.
Necro Attributes:
Curses: 10
Blood Magic: 8
Death Magic: 8
Soul Reaping: 2
Monk Attribute:
Healing Prayers: 10
Total attribute points used: 199/200
Skills: [Attribute] (Energy, Cast Time, Recharge TIme)
1) Signet of Agony [Blood Magic] (0,0.75,15) Signet: Sacrifice 10% of maximum health and suffer from bleeding. All nearby foes take 10-37 damage.
2) Plague Sending [Curses] (10,2,0) Spell: Sacrifice 10% of maximum health. Transfer one negative condition from yourself to target foe and all adjacent foes.
3) Virulence (Elite) [Death Magic] (5,1,10) Spell: If target foe was already suffering from a condition, that foe suffers from Disease and Weakness for 3-13 seconds.
4) Plague Touch [General] (5,0.75,0) Spell: Transfer a negative condition from yourself to target touched foe.
5) Life Siphon [Blood Magic] (10,2,2) Hex: For 12-22 seconds, target suffers health degeneration of 1-3, and you gain health regeneration of 1-3.
6) Suffering [Curses] (15,2,20) Hex: For 6-25 seconds target foe and all nearby foes suffer health degeneration of 2.
7) Healing Breeze [Healing Prayers] (10,1,2) Enchantment: For 10 seconds, target ally gains health regeneration of 3-8.
8) Orison of Healing [Healing Prayers] (5,1,2) Spell: Heal target ally for 20-60 points.
Here is the breakdown of how to execute the skills in the list along with an energy regeneration timeline:
Code:
Spell Energy Time (sec) Signet of Agony 30 1 30 2 Plague Sending 20 3 21 4 22 5 Virulence 19 6 20 7 Life Siphon 11 8 13 9 14 10 Suffering 0 11 2 12 3 13 Blank-No Spell 4 14 Signet of Agony 6 15 7 1 Plague Touch 3 2 5 3 Orison of Healing 1 4