I have also done Both of them and find that I like ancients better. When doing salyer dart I averages 69 deaths used. When I do ancients I average 100 deaths. Not 30 deaths is 9k, about the cost of a p pot. And because I use NO doses with ancients and 2 with slayer dart, I prefer ancients. I almost always get my runes back, and use a water staff. Also, i have gotten about 5k bloods from barrows, more then enough to pay back for anything. I like ancients better because I use less food, it's like a game instead of sitting there praying and I made 7m yesterday with it. If you count the loot, you'll make a profit no matter what.