I have done 23 level Illusen quest (then failed that level 24 quest item)

I am doing Jhudora quest 18...

may I ask which is more porfitable? in what way and are they worth doing it?

because I failed that level 24 Illusen making me feel like I wasted money on something that barely can reward me....

thanks for taking time reading, anyone got their opinions and would like to share with me? after I done Jhudora quest 20. I will stop and see which is more profitable and will continue to do that instead of the other bad profits one... either one of them is more risky than others(as in the items she is asking is higher)?