This tip is especially important for players who have low armor but need some.
Fully upgrading it will result in improvement of the mask's effects.
When you see players with a Berserk Mask, use a highly efficient weapon.
Simply stated, there is no proper way of countering users that use this as their helmet. Most of the wear is instead just for boosters, what you should really be focusing on countering is the weapons that your enemies are using.