It is, as I have read, more profitable to use slayer . However, it appears to take more time which could be used for other profit-making methods RS Gold. Also, if you don't mind, what would be the best setup (preferable less than 20 million) for the method you are suggesting. At the end of the day, is training merely a matter of preference?

It's not necessary to have the top material to train, the benefits are only a small percentage and you don't have to go through Slayer too, neither. It is recommended to train Slayer comes from elite players who are looking back and saying, "meh, wish I trained Slayer Now I'm at 138 and still have 10 levels to go ...". The skill does offer two benefits that are:

You will always kill something new. It is possible to cancel a task when you aren't happy killing something. The downside is that you get bored of it in addition, and you can only block 5 monsters. Some monsters aren't ideal for training combat.

I would recommend that you train through Slayer, anyhow as you've already read the facts, so is up to you. In terms of recommended equipment, a Black Mask or a Slayer Helm is a necessity. Additionally, you'll only require the whip (or a chaotic weapon from Dungeoneerin).

The rest is up to you. In the beginning Buy Old School RS Gold, I'd suggest Torag's plates and legs offering the highest protection value percentage in games (s'far as I can tell) and black dragonhide for the assignments that are based on magic you can begin to work towards the Recipe for Disaster quest.