PenUltima Online

hi
im having some problems fixing magery.
ive noticed if someone with 100 eval casts spell on someone with 30 resist, he will resist, and do almost no damage.
ive tried to fix it in spellrestrictions:

// chk1 relates to the resist ability.
var chk1 := (resist / 5);
// chk2 relates to the difficulty level
var chk2 := resist - (((magery - 20) / 5) + (circle * 5));

i think the problem is here, but i cant seem to balance it out.
idea would be, if
resist > eval -> you resist
resist < eval -> full damage
resist = eval -> small chance of resisting

ive tried some things, but it doesnt seem to work a lot.
any help would be great.
greetings

am i the only one that has this problem with magery?
did noone change the way magery works?