Crypt of the NecroDancer: Death Metal Strategies
[Basics]
DM himself has only 3 types of spawns (1 tile left/middle/1 tile right of the 5th row).
9-8HP: Phase1 (Shield)
When you attack DM's shield, he spawns enemies before he knockbacks. (thus newly spawned enemy can block his knockback)
You can try to deal less than 4 damage to prevent him from teleporting early, which can make fight faster (less teleport).
ex. (zap dagger without damage-up) use electricity to deal 1 damage, then hit normally.
ex. (titanium rapier without damage-up) deal 2 damage next to DM, then lunge DM to deal 4 damage.
ex. (Nocturna initial build) deal 1 damage with cutlass, then hit DM with bat form.
However, sometimes other enemies are messy and these can be slower than just fighting normally.