open wounds is a flat calculation based on character level. I think at lvl 90, you dish out 2156 damage over 10 seconds with it. Something like that.
So with 1 dragon flight kick, you have the ability to do about 5000 damage, minus pvp penelties and resists of cousre, but it still hurts like a bitch.
On ladder, you could go with shadow dancers if you want a really strong dragon flight, but I would still recommend the same thing. Low str req, elite boots. Not myrmiddon greaves, cause even shadow dancers with the -req's is stil 167 str I believe. You can find some rare boots and upgrade them. Use your imbue quests on boots, since everything else is a total waste.
Or, sandstorm treks or marrowwalks are decent choices if your resists are ok.
If you don't have dragon claw, then beating bone necro's is that much harder. I would recommend in that case, Dragon flight the necro, WW through him ONCE, and then run away. Be ready with WW when he bone prisons you. Just ww right through it. So once you have avoided the trail of bone spirits coming at you, regroup, and go back for another.
Dragon flight, WW once, and run again. This way, your venom and open wounds has a little time to take effect.
This is for leet necro's of course. If the nec is shitty, just WW back and forth. He will tank cause all necro's are over confident vs melee chars. They don't count on the venom and open wounds being that much... their mistake