Guild Wars 2

As in, if you collect a bunch do they form a stack in inventory? Yes – assuming the exact same rune.

As in, if you put the same rune in different pieces of armor, do you gain all those listed benefits? Yes. Six of the same Superior grant all six bonuses, cumulative.

If you are asking something else, an actual post would be helpful.

Yes & yes.

6 superior runes of the mesmer stack with each other and you get each of the bonuses if added to individual pieces of equipped armor.

PS this information is available on the wiki.

• in game: type /wiki rune or /wiki and then search from there.
• from here, Rune or copy/paste wiki.guildwars2.com/wiki/Rune