Hello there, first I'd like to thank you for the suggestions you've made here. However after looking over several of them, many can be substituted with a bit of creativity using what we already have in the shops.
Feather Fall: With minor levitation, lesser agility, and wind weaving you could recreate the same effects on yourself. If you wanted to do the same for several others, purchasing tornado while owning Adriel's Pendant would suffice.
Mage Hand: Owning the Jack o' lantern from the Synth Forge would enhance your spectral magic, and you can substitute the uses of this with many psionic spells. Minor telekinesis, shadow weaving, magic unlock together would fit what you need.
Message: Minor telekinesis works just fine for this.
Magical Silence: We have a lot of items to resist different types of magic, even an item that prevents magic from being used as well as other items/spells that deflect magic. Having a single spell dedicated to this would be unnecessary.
Minor illusion: Light weaving + shadow weaving can be used to craft illusions. The same goes for greater illusion. Add in some psionics and you can cover the mind-affecting portion to make it even more convincing. Wind weaving or an event spell dragonic bellow can be used for sound spells. Also bards with their instruments along with psionic spells can recreate somatosensory illusions.
Skywrite: Wind weaving with water weaving can be used together to do this.
Fly: We have a craftable armor that grants flight. Levitation and wind weaving can be used for short distance movement this way too.
Sending: See minor telepathy.
Tongues: We have two spells that grant this, commune with beasts and commune with nature. Telepathy can be used in overcoming language barriers provided you give a reasonable basis in roleplay. To circumvent possibilities of language barriers, most places speak a common language already. (See here:
Linguistics of Revaliir)
Forcecage: We have a magic cage that prevents use of magic and magic nullifying shackles in the synth shop.
Clone: There are many ways you can do this without needing to make an actual clone–shadow cast, summoning a familiar to take on your shape, conjuring an elemental, replication, shadow puppet. Instead of soul transfer, you could buy resurrection and Vaeri's rune, so it will auto revive you if you die and substitute for that instead. Necromancy is also viable as an option.