Hydra sorc depends on several factors to get your damage.
Number of heads:
Each head above 3 gives 50-100% extra damage. So you want the aspect as close to 100% as possible.
The maximum number of heads: 2 from skill, 1 for being healthy, 2 from amulet, and 12 max from tempering and masterworking.
That's 1200% extra damage at 100% aspect.
Amount of mana:
The serpentine aspect gives 1.5% to 3% extra damage for each point of mana.
For example 250 instead of 210 mana give 40 * 3 = 120% extra damage.
Points in primordial bindings:
Each point in primordial bindings gives your summons, including Hydra, 2% extra damage for each summon alive.
Familiar and ice blades are summons too. Each of them alive gives the primordial binding damage bonus.
Runewords:
BacCeh summon spirit wolf. Each wolf that exist counts for primordial bindings.
Nagu Ohm give barb warcry increasing damage.
Cir Vex +1 to all skill
I am using BacCeh and Nagu Ohm because i like the frozen attribute from the wolfs.
Properly configured, you can generate hundreds of millions to trillion of damage.
Horadric spells:
Cosmic anomaly also counts as summon. I use it with smoldring ember, pressurised steam, bloody charm and bottled wind.
Testing can be done at the training grounds in Kyovashad.
By entering the training ground your damage, movement and mana regeneration will raise with 1 point for every cosmic anomaly that appears.
Also for walking around and each wolf that appears as for casting familiar and ice blades.
Google on hydrakuna or d4 rob2628 builds to see how its done.
Edit: forgot one important damage multiplier: storm swell aspect 15-35% extra damage while ice armor is active.
Get enough cooldown reduction so it is active all the time.
15% extra against frozen. The wolfs take care of that.
This post was edited by Caitlin on Jul 26 2025 03:50am