Pump more dps and use trap that stun for 2 seconds...

No problem. Farming in inferno pony is not so rewarding after 1.03 because of the increased repair cost, fixed stuck pony bug, nerfed AS, cloud drop gold only, etc.. Better farm act 1 which is faster and less death..
BUT if you really wanna try with low dps then can follow my way of farming..
Start BROKEN BLADE quest, bring Leia along with you, go to north of the town and kill 5 elite packs for 5xNV.
Then in pony land, just kite and keep spamming 2sec stun trap.
Those hard to handle elite, just kite till ur revive point and deal as much dmg as possible.. Leia is there so they wont get full HP when your dead.. (Don't know if they got fix this & the repair cost after 1.03 ain't cheap) but its the only way to kill those impossible elite..