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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
Continuing on the topic of the Flinger, zap-quake is always a good support. Usually, every side of the base will be guarded by at least one defense that outranges the Flinger. Consider zapping it. Check with the calculator if you are unsure if your zaps will take it out. A flinger will, if you manage to keep it going for the full duration, usually account for 15-25% of the base. The Yeti's inside (or Valks/Super Barbs) will clean up the trash that the fire misses.