I'm around 165k dps running just arch passive (200k if I add SA)
no issues without legacy nats. Ask all those I hunt with... lol.
As we are pretty much aware ... you have 2 basic roads you can travel at higher MP levels
1> high armor/hp/ar
2> high disc consumption to use gloom
Talking Legacy Nats .... we are focusing on #2. To compensate for not having Legacy Nats I use NightStalker (as many do) to add some extra regen based on crits. I also run over 60% CC and have 2.77-2.93 APS.
This allows me to shoot very fast as well as crit a lot to help my disc regen out. It isn't the same as legacy nats because when I'm in between mobs I still only get the +1 regen/sec vs +3/sec to quickly fill it up.
But I can pretty much sit in ShadowPower with my setup in the middle of elites. NO issues on MP6 in a team going after azmodan and sitting in his pools and just keep firing away with SP up. I find with my setup and a 1h bow to have high APS .... no issues with SP and taking the hits.
Even with my setup I have low AR (about 240-250 AR) and still have no real issues on MP6 and MP7 (though I only do stacks/ubers in MP7 mode right now).