I have a few questions, if I may?
1. Is taint bolt, as a spell, able to be blocked with armour or a shield?
2. With taint imbuned into all forms of magic, would they be affected by gold?
3. Will taint fire act in a manner to normal fire, where say if you tried to stamp out a small amount of it, it would not burn you due to minimal exposure?
4. Will taint fire be able to burn on non-living objects?
5. Will taint fire, being inefficient, not be able to burn more than a single tree? As the concept of a entire forest corrupted from a small amount of taint fire would just make it super fast necro corruption, that spreads, and actively forces and removes people trying to combat it.
[Edit] 6. All changes through taint to the other magics from this seem to be improvements. The poison gas air evocation, the now additional ability to inflict telekenetic grip onto a living object as implied and additional fatigue damage in all actions.
7. Taint seed and curses all seem a bit... well, force RP'ed. The issue being that you make them affect their roleplay for a sustained period, and if they do not consent they become 'That guy', if you see what I mean?
Most afflictions can be 'monked off' or otherwise, and as such. You can also just curse entire blood lines and such, pretty much.