We all know this method but I though I'd share some actual data. I did Blue dragons for two hours. With 76 ranged and 76 defence I only needed 5 tunas each trip which I had laying around for some reason. Royal d'hide, arma helm, dual rune cbow (as their weakness is bolts), one antifire potion. I picked up all charms and whatever had more value than dhides. I always left one or two dragons dead before leaving the dungeon so there would be drops for me wehn I returned.
1.6m/h while dbones were 5.4k
I made exactly 150 kills an hour
As an old Runescape veteran I think 1.6m at blue dragons are good enough to be shared.