But if you reduce the damage, then these conditions will barely scratch a high level player.
High level players will never meat low level enemies.
There is a difference between attacks that deal direct damage scaled to the caster's level and attacks adding a condition to the target.
High level players will face the same conditions.
When an attack causes burning or poisoned condition it is not scaled to the caster's or target's level so you will face a balance problem. It will either be too strong for lower levels or too week for higher levels.
Waiting 2 or 3 levels to introduce them will allow the players to get more health and learn some spells to reduce the effects.
Later in the game you will have ennemies producing multiple conditions and/or AoE conditions, along with getting more resistances and immunities.
If you just reduce the damage done by conditions to allow the players to survive in the fight against the first zombies in the western part of the map then you will be quite immune to these conditions at high level.
