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I just bought 5 blades of trapped knowledge on the AH, they were around 20g each
http://www.wowhead.com/?item=31142
Not really replaceable until 70 or close to it, fwiw I also ran bloodfurance 10 or so times between levels 62-63 and never saw the MH drop. <3 RNG
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After reading Suvega's (I probably misspelled it but V's Man (Cant remember how to spell her name either ;( )) I had every intention of grinding to 70 after doing the HFP ad Zang quests (got HFP done and got Zang quests completed but waiting for patch before I turn them in) so I didnt mind running BF over and over again.
After 10runs The mace had dropped twice, once for my main shaman and another for my wife's priest. It only took another 7 runs to get it for my other 3 shamans and my druid so 17 runs total for 6 drops and sitting at just under 65 right now :D
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This should help
Stealthy's Guide
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With the change to Spellpower in the next patch I would imagine the Ring of Blood quest reward mace (available at lvl 65) should be pretty good. Personally I just picked up some AH green daggers and have been running BF both for the mace and for XP to 65. At 65 I plan on stocking up on 3 of the Ring of Blood maces (Pally and Shammies) and 2 of the Ring of Blood staffs (Boomkin and Mage).