Lol Zemfira yet not level 70 but already actively trying to critize one of the patriahs .... lol
But just for reference I recomend you read all what developers said about skill .... to save you headache going trough all thier posts
As per person who developed it:
Skill increase will help you against mobs that cons LOWER then you and effect nearly declined at EVEN cone and wont affect ORANGE and RED conned mobs.... But guess what lol? vs. green/blue conned mobs your masters spells never bonce anyway.
In EQ2 much like it was in EQ1 - level is God, spell quality is the King
Believe you or not but with zero subj and apprentice 1 spell you will be have better success in landing spells on mob that 5 level below you (green con) then with 450 subj and master spells then you trying to land spell on orange conned mob