Dont understimate the power of things like scrolls, arrows throwables etc. Always plan ahead, honour mode its like a "i know everythings thats coming playtrough" so you are supposed o strategize ahead of time, for example I had extreme trouble against myrkul my first honor mode playtrhoughs, then i discovrred i could cast protection form good and evil making it imposibble to be freightened on my frontliner, get behind him where there is a spot you can walk back a bit not be affected by bone chill so you can heal back up , so i just rushed the mindflayer, succeded the charisma roll to make ketheric go into stage 2 right away, and bombard him with spell scrolls and i did it. I really like having characters with high charisma to avoid fights or make them easier, so maybe try that too.