I had the new monster for a slayer asignment. One thing you do get a ton of is fire runes . Durring my asignment i had to kill 90 of them and got about 900 fire runes from drops.
MIne are Barrows:armor is great money plus runes replenish my stock Runecrafting: making laws of nats either way is great money using pouches i can get about 400k-500k an hour