Mod Edit: This thread contains a plethora of useful information regarding the artifact challenge for Demon Hunters, mostly relating to Havoc. Almost every page contains very useful information/tips and it is absolutely worth browsing through if you need assistance. As there is so much information I am not going to quote any of it in the OP (it would be way, way too much to fit) but even if you only skim through you're bound to find some great tips. If you have any questions, reading through these posts will answer most of them.
Note: It may be worth starting on higher page numbers (ie later posts) to find more relevant information as strategies have updated over time and they are more likely to take any potential changes/hotfixes into consideration.
Mage Tower is live on NA servers.
I was able to get to Phase 2... and then pretty much died immediately.
I died pretty quickly in Phase 1 as well, for our normal spec (222X111)... so I tried out 3323333 w/ Raddon's and it seemed to work VERY well.
Just save Eye Beam for the Ice Shards and you're in perma Meta basically... but then had no clue what to do in Phase 2 and died.
Any thoughts/suggestions here? Armory for reference