BLM - Ultima, a Scathe that isn't a massive joke compared to the FFXII Scathe.
WHM - Cure IV, Protect, Shell, Bravery, Water spells, (return of) Aero spells
SMN - Timelord Trance (i.e. Alexander)
RDM - Verwater / Verblizzard
SCH - gib back Miasma II and Bane ⊂(•̀﹏•́⊂ )∘˚˳°
AST - replace Gravity and remaining "Time Magic" with other effects, to make way for:

Time Mage
- with Haste / Haste III spells
- Gravity is their AOE, AST gets a replacement (like how SCH did with Miasma II -> Art of War)
- Comet as an ability / spell maybe? High potency?

Depending on the role of Time Mage, either in fashion as a Time Battlemage (see FFXII Zodiac Age) as a DPS or a Time Mage healer if we dont get chemist, could see other effects happening.

Please don't comment "But AST is basically Time Mage", you will simply waste your time and I am sick of hearing it. ლ(ಠ益ಠ)ლ