For the fastest method in game you need to be able to acces the dominion tower and have completed 'Blood runs deep'.
If you meet these requirements, go to the dominion tower and do a couple of floor untill you have killed the double dagganoth creatures (these guys heal eachother which makes it...
If you know how to handle jads, trying a fight kiln or 2 might not be a bad idea. Even with those stats you could make about 2.5m an hour. It's basicly just knowing the spawns of the monsters, there are a lot of helpfull videos about it on youtube.
If you need to get gear upgrades in the future, there are clan chats such as 'Dung_Smith' whom do it for free, it might take a while before a smither gets online but otherwise they're really helpfull :)