User blog comment:EpicSmith93/EpicSmith's Malzahar Guide/@comment-3363768-20110201023734

I don't know. I tend to avoid Void Staff. I prefer building Spell Pen/Magic Resistance Reduction items. If you changed your quints to spell pen, you'd have 19 spell pen going in, 39 from boots, and if you got an Abyssal Scepter, anyone near you would have a an extra MR reduction - enough to take down any pure damage carry, as most are, plus it also helps anyone on your team that does magic damage, and as the game is mostly comprised of casters, as of late, the extra magic resist for yourself will be helpful. You also already have the 15% reduction from the mastery to clean up any leftover MR. Tanks shouldn't be a main priority, anyway, when dealing damage, and the void staff is really only good if you're going against people with high MR. But this is just my opinion.