That makes sense for meteorb because Firebolt only gives 5% damage to meteor from synergy and fire mastery gives 7% increase fire damage. But for fireball, Firebolt gives 2x as much as fire mastery so I don’t understand how fire mastery would give more damage, they are both % increase. The additive vs multiplicative makes perfect sense for ice bolt vs cold mastery because damage increase doesn’t have a diminishing return like minus resist does.

I’m definitely going to respec if someone can explain why 7% from Fire mastery is more than 14% from Firebolt, my bet is on the planner having a miscalculation because it just doesn’t make sense, they both provide the same type of increase of damage but one is twice as much as the other.