I dont know what all these people said because I dont really have the time to read it and one of the first long posts made little sense to me, so sorry if this has been mentioned.
Personally... I am maxing rush before beholder hex. The rest of the guide seems fair enough, but Rush is much more useful then hex. Hex doesnt allow you to get aura heal and apple at the same time, which is useful at bosses. As you mentioned, you could leave it at 20, but Rush is way more useful while training than a 20 hex. Achilles after rush as well. So 16x should be rush maxing. Also stance should get to 30 before achilles is even touched... stance is vital at horntail and useful when training. Achilles: If you are zaking, keeping your hp around 8k on the right side of the body, then it 1/1's and leaves you with 1.2k hp, You cannot use a ginseng and still be in zerk. Without achilles however, with a 1/1 and a ginseng, im still in zerk =D. Therefore... Max beholder,stance,berserk,mw,aura, then rush, then achilles, then hex. This is my personal approach by experience, sorry if you disagree, and of course I am slightly hp washed.
Personally... I am maxing rush before beholder hex. The rest of the guide seems fair enough, but Rush is much more useful then hex. Hex doesnt allow you to get aura heal and apple at the same time, which is useful at bosses. As you mentioned, you could leave it at 20, but Rush is way more useful while training than a 20 hex. Achilles after rush as well. So 16x should be rush maxing. Also stance should get to 30 before achilles is even touched... stance is vital at horntail and useful when training. Achilles: If you are zaking, keeping your hp around 8k on the right side of the body, then it 1/1's and leaves you with 1.2k hp, You cannot use a ginseng and still be in zerk. Without achilles however, with a 1/1 and a ginseng, im still in zerk =D. Therefore... Max beholder,stance,berserk,mw,aura, then rush, then achilles, then hex. This is my personal approach by experience, sorry if you disagree, and of course I am slightly hp washed.