This is impossible. What they did is change how things were applied. You cannot decrease the max boost without decreasing the minimum boost
Math before is as such
BASE x SPELL. (chill was 14%)
Math after is as such
BASE x (1 + buff1 + buff2…etc) x SPELL
Whereas the main attack and effective HP already operated with:
BASE x (1 + buff1 + buff2…etc)
If you reduce the spell percentage it affects all levels. Base is the base state which also cannot be screwed with unless it causes more problems than we are probably seeing
What you are asking for is to vary the spell percentage as the dragon progresses. This is a much more major change and not actually beneficial to the intended goal.
What I think they should have done is instead make it so spells can be toggled one at a time and change them over one at a time… or they could have just made new spells for everything and only used the new spells on new dragons.
But this is all about putting the toothpaste back in the tube. It’s going to suck no matter what they do for a while.
But you need to get over your misconception about it being a nerf. Pathox is definitely a special case, and dragons like aibrean, fomhar and avyx I think there is an unintended issue for some people that if people could stop raging about spell scaling long enough we can maybe get to the bottom of what’s wrong with it and why.