bcz job uniques have special treatment since they have there special drop tables
here you go
1- check _RefMonster_AssignedItemDrop table how it works
at refmonsterid column > search for id of isis / anubis aka the unique you need how ? use the query below
select id from _refobjcommon where codename128 = 'your unique code name'
so you have the id of each unique now
2- search at _RefMonster_AssignedItemDrop with refmonsterid
and if you want to completely remove the drops you have 2 ways
i- put drop ratio =0
ii- set service =0
p.s : while going to disable or change the drop rate make sure that the itemgroupcodename128 column like 'ITEM_SD_TOKEN%_DROPGROUP'
Regards !