Hammer Strike should be able to knock your enemies back like the Tractor Cannon.
Tempered Metal should also give your allies health recovery upon activation.
Battle-Forged and Vulcan's Rage needs to be on the same node.
Give a perk to gain a secondary grenade.
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Striker already has a secondary grenade though. I think a perk to increase super charge would be better, especially if it was for allies as well. That or they could do something like, damage done to debuffed targets charges you and your allies abilities faster.