I dont know if anyone will know this but worth a go.

Does the drop rate of vanities in say numa vary from boss to normal enemy. If the drop rate is say 1/1000 for both then its more efficient to farm enemies but if it is like 1/50 for boss and 1/10000 for enemies its better to kill boss. I was wondering if anyone knows which it is better to farm on? Would i be more likely to get xray by farming guardian or by farming all maps?

Would be nice if a dev could clear this up because i bet a lot of people are wondering it i dont even need to know the figures just if a boss is more likely to drop a vanity than a normal mob.