Phase 2 (Putrid Wolf Form):
Desolation: When Geonor uses Desolation, wait until he finishes the cone attack before moving in to Path of exile currency deal damage.
Misty Attack: During the Misty Attack, focus on dodging the werewolves while Geonor is preparing his dash. Afterward, attack him when he’s in the mist.
Upgraded Requiem on High: At 25% health, move in close and try to maximize your damage before he uses his upgraded Requiem on High. Make sure you have enough flasks to sustain you through this critical phase.
Ranged Strategy
Phase 1 (Human Form):
Stay at range: Keep a safe distance from Count Geonor to avoid his close-range attacks. The main danger is his Ice Walls, which you can dodge from the other side of the arena. Use non-Cold damage skills to avoid resistance.
Phase 2 (Putrid Wolf Form):
Requiem on High: During the Requiem on High phase, stay far away from Geonor and avoid his falling ice shards. Use ranged AoE or high single-target damage skills to hit him while he’s not performing his aerial attack.
Ice Spikes: Move to the outer edge of the ice spike circles to avoid damage, while continuing to attack Geonor from range.
Misty Attack: Use this phase to poke at Geonor from a distance, while dealing with the werewolves with AoE attacks.
Survival Tips
Mana and Health Management: Make sure to have plenty of mana potions and health flasks on hand. The fight can be drawn out, especially in the second phase, and you’ll need to be able to recover quickly.
Keep Moving: Both phases require constant movement to avoid environmental hazards like blood circles, ice walls, and falling ice shards. Don't stay stationary for too long.
Dealing with Werewolves: When Geonor summons werewolves, quickly eliminate them to avoid being overwhelmed. Use AoE skills or range to control the mob.
Conclusion
Defeating Count Geonor in Path of Exile 2 is a significant challenge, especially when he transitions into his Putrid Wolf form. With careful positioning, dodging, and knowing when to attack, you can overcome this tough boss. Make sure your build is capable of handling the fight, and always keep your equipment in tip-top shape before the battle.

Once defeated, Count Geonor will drop valuable loot and buy Path of exile currency unlock the path to Act 2, where more difficult challenges await. Good luck, Exile!