limited funds - which spells are essential?

[Neon Archie]

Can probably skip Starshine and Halo of Light, these are spells that generate light sources which you may not need if you have infravision naturally.

Would skip Summon food / drink. Bind Forage to a command key like "A" and never run out of food/drink.

Would for sure get these type spells as priority:
Movement enhancers
Direct Damage
Heals
Thorn Coats
"Skin Like" line

Then get:
Endure lines
Animal charm / invis

The first 15 or so levels it can be a challenge to get all the spells when you ding. After that though you should start making enough coin to go back and buy the ones you missed, and it won't be an issue getting them all going forward