this is what i was thinking

death magic-12
illusion magic-11
soul reaping-8

deathly swarm
putrid explosion
death nova
phantom pain
conjure phantasm
virulence
taste of death
bone minions

My strategy would be to begin the battle with my DoTs and deathly swarm. Then when I have access to some corpses, I would raise my bone minions, cast death nova on them and as they rush to battle use taste of death to heal me and kill them, setting off the death novas. As my enemies are poisoned in this manner, I would cast virulence on them to hit them with disease and weakness as well. I would use putrid explosion in cases where I just wanted to cause some damage, like with groups of one or two enemies in sparsely populated areas.

Any comments or advice are appreciated.

Disease is a condition that needs to be built around. You can cause just about as much trouble with your own people as you do with the opposition as it will spread to anyone in contact range.

One way I have seen this used well is with someone running Martyr/Purge so they can quickly remove the Disease as well as other conditions from your team mates.