EXP gain is too high, is there anything I can do about it?
Have you applied the Mode Coefficient Fix?
(What’s a Mode Coefficient?)
The short explanation is “search the patches list for Mode Coefficient Fix and apply it”.
Patch Name:Adjust Mode Coefficient Experience Gain @FE8U
Author / Source:Vennobennu EXP Formula "Mode Coefficient" Fix - #2 by Venno Compatability:7743
The longer explanation is:
In the Normal modes of FE7 and the pre-routesplit chapters of FE8, there exists a value in the EXP formula known as the Mode Coefficient. The Mode Coefficient causes overleveled units to gain more EXP, sometimes more than underleveled units and sometimes by a ludicrous amount. It promotes snowballing and juggernauting and just results in an unbalanced EXP curve. The specific mechanism of what it does is roughly that, if your level is higher than the enemy’s level, it treats your level as half of what it is. (There’s some more stuff going on with class relative power but you get the idea.) You can remove it with the Mode Coefficient Fix patch, and I highly recommend doing so.
If you still need to adjust EXP gain further after applying the Mode Coefficient Fix, you can use the Modular EXP patch, which is included with the SkillSystem. It allows you to set multipliers and divisors on EXP by source, class, chapter, etc. for detailed control of EXP gains.