If you have an orqheus rigs hunter on your team in onslaught, when they put a tether down just before the spawn point, dont be a chad and run past the tether tying to kill everything off spawn. If you let the enemys migrate into the tether they can chain tethers with as little as a few seconds between. This makes for easy onslaught runs to 50, is faster then spawn camping at the later waves and feeds the whole team tonnes of super allowing everyone to pop whenever they like. Shooting fish in a barrell, win win for the whole team.
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Also if there is more than one in the group wait out the tethers. You only get return on tethers from yours if the targets are not tethered by another tether. Someone of the two would get short changed if they are close enough to compete for attaching to enemies.