The build I run for my Smeeta, she doesn't need damage, she needs survivability because the more time she spends dead the more time you have wasted because she didn't use her Charm.

Arsonistic's build https://overframe.gg/build/8828/smeeta-kavat/max-survivability-buff-smeeta/ go give him a thumbs up. Best Smeeta build. Has QOL mods Fetch and Primed Animal Instinct, has must mods Charm buff and Tek Enhance to increase [Charm] buff duration. Has survivability from Tek Assault immunity, Link Health, Link Armor and Synth Fiber for max EHP, Hastened Deflection for shield gating and Medi-Pet Kit for hp [Regen] and extra bleedout timer.

Run Link Shields instead of Hastened Deflection (drop one level from Medi-Pet Kit to fit) if you're playing Hyldrin since these mods give stats to your companion based on your warframes stats.

Do not run Mischief, the mod has negative interactions with invis strategies and the trigger animation locks out Charm triggers for a short moment.

Please pay attention to your mod positioning. Companions have priority in casting/using skills/mods based on their positioning, it goes left to right top to bottom.

Build is expensive (6 forma) but totally worth it.