[Caliban] is a really interesting frame. He's kind of tanky to start with and any basic builds he can usually survive steel path out of the gate. This build focuses on the armor strip ability and his shield and energy [Regen]. The full augur set is needed to maximize on the ability strength and shield [Regen] but one missing won't kill the build. The only changeable mod is really [Vigor], you can swap with [Equilibrium] for better energy retention or [Rolling Guard] to get rid of procs. Combine this with one of my [Stahlta] builds and you have the best armor stripping, AD clearing, tanks in the game.

(Basically use any AOE weapon with Blast or some other damage increasing proc)
Max AOE:
https://overframe.gg/build/298818/stahlta/stahlta-god-gun/

High Faction Damage:
https://overframe.gg/build/298834/stahlta/stahlta-faction-slayer/

Secondary Weapon:
(replace one of the mods with augur for max frame support or leave out for a quick stun and retreat)
https://overframe.gg/build/299457/azima/azima-faction-stun-gun/

Melee:
(Heavy blade or dual swords with viral, once amror is removed you can sweep viral for max damage to health)
Try this build out:
https://overframe.gg/build/300357/scindo-prime/no-forma-nasty/

If you want I would recommend using helminth on the first ability and replace with Silence or [Howl] for more damage output