It's called "Intellect". With 300 intellect, camping matches typically give you a super every other round or so. When you combine that with orbs made from another super, it goes somewhat faster.
Don't like getting tethered regularly? Don't drag out rounds so long. Push up, use that primary.
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Fireteam member has a videoclip saved of his stats before and I'm the middle of the match he had A discipline build with very little intellect