Shifting power is returning, sadly without the conduit, but it's still very beneficial.
Blast Wave is a returning spell. It was previously a knock-back on a 30 sec CD, which was extremely useful for Mythic+.
Temporal Warp was the famous double bloodlust ring from Legion, essentially granting you the ability to blood lust twice for yourself.
The good old Dragon's Breath is finally being added to all mage specs instead of just fire. It's essentially an uncapped AoE Disorient on a 45-sec cooldown. It's extremely strong in Mythic+, and some raid encounters where adds need to be controlled.
Single Target (Raid)
Key points about the single target build:
Mythic+ & AoE
Key points about the AoE and Mythic+ build
Regarding the Spec Tree, the focus of this build is similar to the single target build we looked at, and the playstyles are also very similar.
Instead of Nether tempest, I recommend picking reverberate since it has more interaction with our barrage and mana regen, and Arcane Barrage into Arcane orb into Arcane barrage combos with Arcane Bombardment.
You can also use this setup on some bosses that have AoE, like Echo of Neltharion, Sarkareth and Forgotten Experiments. Orb Barrage is a very strong talent that has very strong AoE potential.