Swap for Auto-Omni

Grouping/Pulling build
Railjack buddy build

Flex Precepts
[Cordon] (7I)
[Auto Omni] (7I)

Flex Precept Options
[Guardian] (7I) = Boosts owner's shield by 100% when it runs out (30 second cooldown)
Shield Charger (5I) = Increase warframe max shields and shield regeneration by 60% for 10s (30 second cooldown)
[Medi-Ray] (5I) = Sentinal will occasionally heal owner for 12% health over 4s (15s cooldown, is based on % of total health pool after mods)

Flex
[Duplex Bond] (9V)
[Manifold Bond] (9D)

Flex Options
[Aerial Bond] (7D) = Airborne kills decrease recovery time, creates field of cold where jumping from
[Tenacious Bond] (7D) = headshot reduce recovery timer, adds +1.2x Final damage crit multiplier (requires [Vulcax] or [Vulklok])
Momentous Bond (9V) = Killing eximus gives companion random elemental damage for 30s and reduces recovery time
Spare Parts (7-) = Sentinel marks target every 15s, for 5s, with 200% more likely to drop item
[Synth Deconstruct] (9V) = Enemies injured by companion have 25% chance to drop a health orb when killed