If you're using secret's mod, then it should work as intended.
Not sure how this can be translated to item bonuses, possibly
bonus2 bSkillAtk,skill id here,getskilllv(skill id here) * 200;
bonus2 bSkillAtk,skill id here,getskilllv(skill id here) * 60;
bonus bMaxHP, readparam(Baselevel) * 100;
bonus bVit,readparam(bInt)/5;