Ok here it is, the wonderful easy way!
First off, type ::runes and drop EVERYTHING but fire and nature.
Next, go to ::minning. Get a full inventory of RUNE PICS. Low/High alch then (32k each high alch, dont know how much for low).
Keep doing that!
*PS: I dont know if you can do this or not but I downloaded a mouse recorder to make this easy. If you dont wana do that, hit F7(brings you to mage tab/book)and click high/low alch. This also quick!
Mouse Recorder Download Link:http://www.download.com/Axife-Mouse-Recorder/3000-2072_4-10584257.html?tag=mncol&cdlPid=10584258
Mouse Recorder Download Link #2:http://www.gold-software.com/download8912.html
The first one uses Download.com and other uses a simple google searches.
*Note: If you know a better mouse recorder, just PM me it and ill update. Thanks!