Support Umbral Night Equinox - Empowered Pacify

Important: You need to spawn in night form using an appropiate warframe color

Build focus is to keep active Pacify & Provoke with Peaceful Provocation slow

You can safely keep getting some damage sometime, with shield gating / damage reduction of Pacify & Provoke, so you can trigger the arcanes to keep tanking more (Arcane Guardian) and to deal higher DPS (Arcane Avenger).
Moreover, you can swap aura to Combat Discipline to trigger the arcanes more reliably (eg: if you want them active in low enemy-density mission types)

Mend & Maim can be kept always on if Arcane Energize is swapped in (for example switching Arcane Guardian)

Notes:
✓ Slow is capped (200% Pwr Str with Empower
✓ High range
✓ Optimal uptime of skills 3 & 4
✓ Good damage reduction
✓ Good use of overshields and shield gating, albeit not maximized

✗ EHP is not maximized
✗ Day-form (and offensive abilities) disabled
✗ Cannot consistently use Adaptation (may not really be a bad thing actually)