Just gonna leave this pre-ptr feedback (while also being a broken record):
If it’s Blizzard’s intent to get rid of wizard’s dependence on Death Wish and Etched Sigil; then I recommend changing Death Wish and Etched Sigil so that they buff only the channeling skills instead of changing Etched Sigil to benefit solely Energy Twister. I think it’s worth mentioning, that even with Death Wish and Etched Sigil, the channeling skills are still on the weak side of the spectrum.
For example (damage numbers serve merely as placeholders):
Arcane Torrent, Ray of Frost, and Disintegrate no longer ramps up and now deal their maximum damage. Arcane Torrent, Ray of Frost, Disintegrate, and Disintegration Wave all deal 300-400% more damage.
Arcane Torrent, Disintegrate, and Ray of Frost damage is increased by 250-300%, and you also cast one of your other damaging Arcane Spenders for 75% of their damage every second.
Also if you’re set on tying the Blizzard skill to Winter Flurry, then I ask that you don’t just let hydra benefit from the damage modifier, instead let it be a global buff. Same for Fragment of Destiny, have it’s secondary bonus benefit wizards globally instead of only Hydra.
Fragment of Destiny:
Your Signature Spells attack 50% faster and deal triple damage. You gain a Spectral buff for 10 seconds whenever you land an attack with a Signature Spell. You deal xx-xx% increased damage for each Spectral stack. Max 10 stacks.
Enemies killed by Cold damage have a 25% chance to release a Frost Nova. You deal 125-150% increased damage to enemies in a Blizzard.
Or change Winter Flurry’s overall effect to something akin to:
Cold skills release a blizzard upon impact. Enemies in a blizzard take 100% more damage from you. This bonus is doubled for Cold attacks.
Afterward, Hydra (via Typhon, serpent sparker, and magistrate), Energy Twister (via DMO, Valthek’s Rebuke, Twisted Sword), Meteor (via The Grand Vizier), Explosive Blast (via Wand of Woh and Orb of Infinite Depth), etc. can be buffed directly through the skills themselves or via their respective legendary items. That would help make up for the loss of power that is inevitable when the arcane spenders lose the damage bonus that was provided by the Death Wish + Etched Sigil combo.
Also, while I understand that it may not happen this patch, I do hope that Firebird is on Blizzard’s radar.