This is my experience with the new Disco Aura.
I have a lvl 78 Bowazon that has completed all but Baal in the 'Lets Rock" level. I have good life and mana leech, full Bartucs, with the new boots(95% resists all) and a Faith bow.
Since the 7.61 patch, I cannot go from the Frigid Highlands wp to the Arreat Plateau wp without bailing out of the game.
As a Bowazon, you can only leech life and mana from mobs that you can hit. If the mob is not in your line of sight(as behind a wall) you can't hit it, thus you can't leech from him. But he can leech your life and mana from behind any object, like a tree, or from behind said wall, where he is safe from your attack.
I was repeatedly leeched dry from these hidden mobs while others ran up to me to hit me. You just cant drink fast enough in a situation like this. I tried to get to the hidden mobs to kill them, only to be drained by a new one and chased back by adds. After about 1/2 an hour I gave up to check out other locations.
I found the same thing every where I went. Where there was an object that could block my line of sight to my attack, I was eventually overwhelmed and I had to leave. I was even chased out of the normal Cow level.
Here is another situation that caused me to have to bail out of the game.
I met a Disco mob who was Immune to all my attacks(or to my most damaging ones). This is a most fearsome encounter as they most always bring along some friends. Normal tactics do not apply here. They will Drain you while attacking you, while you try to kill his friends. One or more of his friends may also be Immune to you and one or more may also have Disco. This was how I was chased out of the Cow level and the Outer Steps,,, embarrassing.
While it is not unusual to have to drink while fighting, having a high leech Zon, who is a fragil character to start with, who now has to drink a full Rejuve every 2 to 3 seconds, is most unusual and ultimately a deadly combination.
As of this time I don't have a character who is able to play in this mod. I never have liked D2 melee characters and I don't plan on ever playing one. If Disco was put in to make more people play melee characters, as it seems to say in the Readme.txt, you have lost one devotee here.
I love a challange. I hate the Impossible.
This is the only game I presently play and I do not find it Fun anymore.
I will retire my characters for now, just to keep them alive and see what happens.