Its nearly impossible for any newbie to beat the game when it is set to very short. I recommend making it longer.
Topic on Talk:A complete newbie guide
From Portals of Phereon Wiki
Longer game will require effective use of breeding techniques which are not covered by this guide. Going for a very short run and using just only unique characters should be suffice to beat every story encounter, making it longer will make it much more difficult since uniques are not scaling but enemies/rivals do. I've posted on discord 2 gameplay videos that closely resemble following this guide, a king was beaten on day 5 and that's already an endgame, final encounter shouldn't be much more difficult. And I've recorded it on 200% difficulty, so anyone can follow it.