1. Jailbreak your devices, install Koreader and sideload comic in cbz or epub format. Problem is that you may already be on firmwares that aren't jailbrakable, yet.
2. Use Kindle Comic Converter to convert the book. I can't help you there, my knowledge of this program is very limited.
3. Convert your comic to fixed page kfx format, and sideload it. Instructions:
https://www.mobileread.com/forums/sh...ght=kfx+output
You will need to follow instructions for Command Line Interface (CLI), and use it to convert the file. File sizes can go up to 1GB that way, and it's imho the best way to read comics on Kindle readers, quality wise. It's not an easy process, though. It involves using Kindle Create to create kfs files, then converting those into kfx via CLI.
4. Reduce the size of you comic so 'Send to Kindle' will accept it. Comic will be converted to fixed page kfx on amazon servers and sent it to your device. Look up size limits for 'Send to Kindle'. Amazon will further degrade quality via 'Send to Kindle'.