Rs Dungeoneering, fastest way to train?

kk so i am level 121, and i need 25 dungeoneering and 13k tokens because I want gem bag. I have 10 Dg right now but I want to know how to train faster. Should I play Members or free, and complexity 1 or 6. Here is my hiscores link so you can see my levels. my name is Doom IIV a href="http://services.runescape.com/m=hiscore/hiscorepersonal.ws" rel="nofollow"http://services.runescape.com/m=hiscore/…/a