Advanced gearing
Introduction
This guide will focus mainly on Inhibitor's mechanics and the general framework for building a team to beat Inhibitor comfortably.
Important Mechanics
The Inhibitor will always spawn a Defender CO in front of it when the fight first starts. To kill this defender, you have to complete the hit check (i.e. it is based on number of hits, not damage dealt) on it before the timer runs out. Completing the hit check allows you to completely kill the defender, which then allows you to attack the boss. Alternatively, you can also just use Operator Momo's active skill to instantly kill the Defender CO via her heal reflux (The CO has a permanent healing buff which is only removed after finishing the hit check, but Momo's heal reflux can instantly nullify it).
At around 2:03 and 0:35, the boss will also use a map-wide attack. On lower Inhibitor levels, such as level 70 and 90, both wipes are not strong enough to kill your units, but at lvl 130 and 150, the second wipe is strong enough to kill all your units except for naturally tanky units like defenders with MDL or units with immortality. For the first wipe, it is recommended to try and mitigate some of the damage dealt to your units by using shields from supporters like Harim, and Awakened Shin Jia. Done correctly, your entire team will survive the first wipe, even against the lvl 150 Inhibitor (Defenders are also not required for “protect” damage res if your main tank is built well enough to survive the whole run).
Finally, the Inhibitor has a laser on its Special Skill which will hit all your units and knock them to the ground. This attack cannot be countered as it has Ultimate Tier hitstun, and it is recommended to use shields to prevent your units from dying.
Basic Team Building for Inhibitor
The most important unit for Inhibitor is arguably Lin Xien. Without her, you will get nowhere close to deploying your entire team before the second wipe. The fastest runs even use two Lin Xiens (one in the main team, and the second from branch office support).
Ideally, with proper tank gear, you also will only need one primary frontliner. For this purpose, either Chifuyu or Ciel will do great. However, if you are using the Momo strat, you will need a Defender to trigger Momo's skill; Any 3 cost Defender will work fine for this.
There are many DPS units that will work in Inhibitor, so your priority will be on picking the best options available. Some of these standout units include Sobin, Rebecca (a monster who also doubles as a debuffer thanks to her anti-Mech kit), and Rearmed Gaeun.
There are many supporters, buffers and debuffers which will work in Inhibitor. Some of the best ones are Awakened Shin Jia, Harim, Agnes (who also doubles as a great DPS), and Seo Yoon.
Video
For reference, I have linked a video below of a Level 150 Inhibitor run.