If you want to cast a skill for the effect and not the damage, you do not care about your intelligence. Putting one point in to learn a skill, will ruin the 'classic' warrior style but give a lot more flexibility. This was always one of my favorite possiblity of those offered by the classless D:OS-System.
DoT effect against armor sounds nice, but not sure, if they can make it, that magic damage can cause an effect, even if there is still magic armor left to protect from magic damage. Or making a magic skill afflict physical damage against armor.