AH64D Apache Longbow
A129 Augusta Mangusta
Mi 28 Havoc
Kamov Ka52 Blackshark varients
Eurocopter Tigre
Rooivalk AH-2As
Correct, service ceiling is a direct indicator of lifting power, and it will basically tell you how a heli will perform in mountains.
In this respect, the Ka-50 beats every other design out there. And that's the only thing is beats other helis in. Everything else about it right now is worse.
As for Mi-28 having 'far better characteristics than AH-64' ... which characteristics would those be? Its missiles are worse, and in the rest it's no different (it uses radio-beam-riders, BTW, which means it must be exposed for the duration of the shot, while the AH-64/A/'s LOAL capability allows it to pop up, find target, pop down, fire, pop up and designate for the last 3-5 sec of flight).