Originally Posted by
Ambulatory Cube
I wouldn't reccommend crating Pandarian artifacts for Tol'vir. It may seem quicker, but one entire pandaria digsite = 1 artifact crate = 5 to 9 Tol'vir fragments, the equivalent of digging only once at an actual Tol'vir site. Also you miss out on the vendor trash, which does add up quickly if you're doing a lot of solves. I've made quite a bit of coin from the junk.
I'm over 200 Tol'vir solves and haven't seen the Scepter yet. So far I've solved Scarab Pendant, Ring, Staff of Ammunae (which is apparently also really rare, go figure I get that piece of crap /sob) and the Crawling Claw.
Random is random. Some poor WoWhead commenters are well over 600 solves and STILL haven't seen the Scepter, and some lucky punks got it on their very first solve. The addon Rarity lists the average around 500 or so solves, so..
Just keep swimming digging...