How to beat chapter 27
If you have trouble beating chapter 27. Here are some suggestions which help you.
1. Move Speed + High Evasion Rate
It is advised to upgrade Build Body to BN Unit-5, BN Unit-5 gives you Move Speed +5%.
High Evasion Rate can be gained by equipping the Vibrating Module.
If you use circular movement to round the enemies, for example, using Plasma Field or Turrets, you would better raise your Move Speed as some enemies match your normal Move Speed. Move Speed +5% will get great help in game stages.
2. High Defence
Some enemies will crash into you and deal great damage. High defense can boost your survival rate.
Equipping the Polymer Armor will help a lot.
3. Use different movement
Since you want to avoid some enemies which crash into you at a very high speed, sometimes circular movement is not helping you at all.
You can use S-shaped or Z-shaped movement instead.
4. Upgrade Chipsets
Since you will spend part of the gem for High-Tech Chipsets after chapter 27, it would make sense to players that they probably need to upgrade most of their normal Chipsets to Unique grade on or before chapter 27.
The game design in that way, probably.
5. Example for beating chapter 27
High Evasion Rate + High Defence + Turrets