Made a checklist to keep track of what to kill for the sigil achievements.

You only need 300 out of the 330+ sigils you can get.

Some monsters do not have major sigils and they will give out a random major sigil for another creature.

You can use this guide to check which major sigils you are missing, the name of monster and the minor sigil you might find it in.

Minor sigils spawn monsters at random but always the race the sigil is for.

Do not fight minor sigils in the castle, the drop rate for major sigils is low, do it in levels 100+ if you can.

I'm missing a couple of major sigils, I ran out of cores and after all the work didnt feel like extracting more for the RNG to not give me the monster I needed, so yeah.. if you know the major sigil name of the ones Im missing do feel free to leave a comment, thanks!

https://docs.google.com/spreadsheets/d/e/2PACX-1vRtTGZ-2USyV20iVi-8f70cntg_UBZEdA3vJYrcMtfFd_yEIYH4A8gAFgXMFjYlE2fgD3dHdkDe_oG2/pubhtml?gid=0&single=true

By using the spreadsheet, you can delete the name of the major sigils you are missing, then select the three columns, sort data by... use header then use Minor, you can then check which minor sigil will give you the most major sigils you are missing.