Ok i understand the benefits of tiering in general for weapons and armor. It gives like 10% per tier and all and increases the defense/damage values of armor/weapons.
Just FYI because this is a common misunderstanding. A lot of people think weapons are either 5% or 10% increase per tier. I can tell you that I stuck with T9 on my Jenny's Power xbow because T10 was only 3% or less of an increase over T9 (dps, damage, and stats/PA). So always check (using item preview or charplan add ons) before you tier anything, to see if it is worth it to you or not. Of course, there is the other reason to tier excessively, makes your epeen WAY bigger