I am looking for a slayer monster that i could kill to make a profit with mage, pref magic dart. The only monster i do not want to go for is the abysal demons. Is there any other slayer monster with good drops?

bloodvelds are always good

abyssal demons, nechryaels, gargoyles, and aberant spectars all drop multiple goods.

Skeletal Wyverns :P, The g legs worth like 1m+, its a rare drop but I like it, OR you can try Infernal Mages, abby demons and other stuff

Not really any slayer monsters with good drops which you can mage. I'd advise killing Iron/steel dragons if you want to mage though, great "normal" drops aswell as Dragon Legs :)