http://www.wowhead.com/world-quests/na This may help if you have toons that have not uncovered/unlocked each zone.

The unlocked Mage Tower also means unlocked Artifact Weapon appearance unlocks. As was stated by the WoW development team early on, the challenge will be very difficult. There's a good thread on /r/wow about the boss challenges:

https://www.reddit.com/r/wow/comments/6357k7/insert_boss_tips_for_your_mage_tower_challenges/

With the release of Patch 7.2, we’re increasing the difficulty of (and rewards from) Mythic Keystone Dungeons. To help you prepare, we’d like to provide some clarity on what those changes entail.

After Patch 7.2 has been released, the minimum item level of the rewards found in the end-of-run chests will be as follows:

Mythic 2-3: 870
Mythic 4-5: 875
Mythic 6-7: 880
Mythic 8-9: 885
Mythic 10+: 890

(Note: bosses in Mythic Dungeons run with no Keystone active will drop item level 865 gear.)

The minimum item level of the rewards in the weekly Challenger’s Bounty chest (found in your Order Hall) will be based on the highest diffi...

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