Dead
Perhaps, visiting the Erliente Dukedom and paying for a chance to attend a Bestowal Ceremony is the best option to summon your Arcana.
After all, a chance of 4 times a year is still a bit too low considering their numbers.
However, the danger that the half-imps would face isn't any lower when leaving this chaotic land.
They are hated due to their bloodline that is synonymous with evil.
On the other hand, their elders can also create a ritual to request some Arcana to their imp god depending on their sacrifices. The only problem with this process is that the Arcana is definitely a troublesome one and could even be at the level of a genuinely Cursed Arcana.
This is why they are quite excited about Ruthren's plan for Bestowal Ceremony. Though only a few of them can get a chance, it will still help them a lot in the process.