At level 200 most classes will have sonic team armor and red ring equipped most of the time putting their resistances to 110/110/110/85/85 so that gives you full immunity to all elemental attacks except light and dark ones. I notice a lot of max stat plans have using adept to max out being more optimal than centurion/arms because of the 6 resistances. What I'm wondering is what difference 91 resistance in light and dark will make. What do you survive or have a better chance of surviving with 6 more resistances in light and dark. Of course if you want full immunity you equip a wizard/resist.