This method is a lot slower and OSRS gold, arguably, takes more planning and you're far more vulnerable to crashers messing up your spawns, but you ought to be taking no damage whatsoever except from Spinolyps, so for beginners it tends to be easier, particularly if you're not knowledgeable about the kings' max hits and if to flash soul split/etc.
You shouldn't need a yak if you've completed the elite frem journal, however it's almost necessary if you haven't, otherwise you lose out to a massive part of your profit and it is not even worth DKing in the first place, if you don't DK for pleasure not profit (such as me).
Overall, if you want to be good at murdering any boss, research and test different methods yourself. I seldom see anyone else with a titan in DKs, despite it increasing your kills/hr massively, you can't charge the hides without amount pots either (as you kill the sins too fast) and using frem boots 4 means that if you draw friends it doesn't matter how quickly your kills are, you won't need to worry about your yak scroll exercising. In case you have any more questions feel free to answer here or comment on my blog asking, my PM inbox is 1386% full now.
Now, I'll explain why: RuneScape for a RuneScape gold buy is unable to copy mainstream MMOs due to how the center of the sport works.