Lots of people can beat it and it’s apparently been done at 900 ilvl without any healing legendaries. If you can’t manage it at 902 with legs then it’s just a matter of increasing ilvl or changing strat until you find something that works for you. I haven’t bothered trying it yet so I can’t help you any more than that.
i did it with Twisted nether and legs @ Ilvl 901
i used the Falcosaur egg food (10% haste and moventspeed) and just focused on adds and not on the boss health. tho if it take more then 4-5 min to get into PH2 i just wiped it.
another thing that helped me at the start was i would leave the first adds up so i could just spam CL and Earth shock till the 2 servants and bomb imp spawned then i would pop my first Stormkeeper to burn both servent/healer imp and the bomb imp down.