This is my buff build, provides a 50 second buff for 224% in a 20 meter range. Aura slot has an aura forma, to allow for [Growing Power] instead, should that be preferred. Don't forget to activate Empower, then [Energy Conversion] before buffing, for an extra 100% power strength combined. Another way to further push this build is a kitgun with Pax Bolt, which adds another 30% strength on headshot kill. Arcanes for this build dont really matter/are preference.