You did a hardmode with a companion and no tanks?
Yeah, we're all geared in all champ pvp gear though, including my companion.
With no tank, only the first robot presents a challenge (he shoots through walls now). The 2nd boss is easily kitable, especially if you have sorcs to grip people out of the way.
The third optional boss can be Dotted and LoSed and killed even through enrage.
Yadira hits like a wet noodle, and can be tanked by even ungeared people.
In some ways, the instance is much easier with all dps and no tanks or healers, you never hit enrage timers that way.