Got 1.3k addy nails order completed during the night, so today fletched some addy brutal arrows and when to the Zogre area.
In about 2 hours of training I got 44 000 ranged exp. The good part is that I also got 210 zogre, 26 fayrg, 17 raurg and 2 ourg bones in that time, also about 35-40 charms (didn't count them, mostly gold).
My strategy was to range zogres/scogres, fill inventory with bones and keys, load terrorbird with 12 bones, fill inventory again, then use all the keys on the coffin near the dungeon entrance, drop the junk and fill whats left. Then ring of dueling to Castle wars, bank, repeat.
Ranged exp isn't great, but the prayer exp is very good. These 255 bones are worth 8821 prayer xp, about the same as 122 dragon bones (it's pre-gilded altar). The test was done at ranged lvl 76, at this level I can get 45 black dragon kills in 2 hours, and thats about 100 bones. So from prayer perspective Zogres are better. The drawback is that you will need to spend twice the amount when running at gilded altar with Zogre bones than with dragon bones.
In conclusion, I found that the place is well worth the try, especially for the lower levels (bull ant will awork for those lacking summoning level). When the dungeon was released, many players started complaining its useless, but if you can get your hand on brutal arrows (and that is not that hard, just buy achey logs and nails and fletch them yourself), the reward is decent.
Edit: While getting 1028 zogre bones, I also got 90 Fayrg, 47 Raurg, 15 Ourg bones. Thats what proportions you might expect to get when keeping all the bones and using all the keys.



