Here’s a nice Demonology tech order (slightly modified from Anemone’s
T1: Bone Collector, Bone Collector
T2: Plague Spitter, Sickness
T3: Blackhand Dozer, Voidblocker
T4: Shrine of Forbidden Knowledge, Death Grasp
T5: Zzarramode, Zzarramode
Note: if you are planning to put Garth to max-band on any particular turn, and don’t already have a legal target in the discard pile (you’re allowed to check) swap out the first tech card listed for an appropriate unit (Twilight Baron if you don’t have Tech II active, Blackhand Dozer if you do).
Worker Jandra, the Negator, Poisonblade Rogue, Skeletal Archery, Pestering Haunt
Strategy: build board presence with strong units, supported by removal spells and build to your Tech III.