Talk:Runebook/@comment-124.171.179.29-20100709123717/@comment-1879248-20100914025829

Primary means you are using the rune that is intended for that slot, if you use a secondary rune then you are not getting as much of a buff compared to what you would get from a primary rune. To maximize bonuses you need to get marks that are attack runes, seals that are defensive, and glyphs that are utility.