There should be a Guide for Tears of Guthix mini-game. From lvl 1 to 30, exp per tear is unknown to me (yet). However, past lvl 30, each tear gives 60exp each in the skill with the lowest level. You need a Spiny Helmet and a light source to get there. The fastest way to get in the cave is by Lumbridge Castle cellar or by teleporting to Draynor and walking east. You can go there once a week. That's what I got. Making a page for it would be cool. Also, when I use your "google search tip.it", I can't find the word tear or tears, even though I found it manually tons of times.