The MVP mobs should drop the same stuff as the regular enemy would, that's why people farm Baphomet for the Evil Horns and farming Ghostring for the Fabrics. If you have a look on RMS it shows the exact monster ID for the slaves, like the Baphomet Jr Slaves are just the regular Baphomet Jrs (they both are Monster ID 1101).
[tnx

wait!
when i check baphomet, it says it has 2 types of bapho jr as a mob, one that is indeed the same ID but one isnt, which has no drops at all
same goes for ghost ring...
but the mob im after is porcellio...and when i click on ungoliants mob it refers to the porcellio which doesnt have drops..
but the odd thing is that is says it has 3 porcellio, tho ingame it has 8...and i did get stuff from them, i even got the MG[4]...but i also had a rough elunium, which isnt dropped by any monster in that map (einfield_07)... and never had one from regular porcellio too...
so im pretty confused now
