Need bedtime help for deaf 2 and half year old

Our middle child is deaf and was very ill as a baby so we abandoned all sleep training with her and would bed-share as we were terrified that she would go into respiratory distress and we wouldn't know unless one of us was with her all night. She's now fully recovered (aside from being deaf) but we can not seem to get her to fall asleep independently. She has two siblings, one older and one younger who we can put to bed and who will fall asleep quickly on their own. Our little lady will scream for hours if we are not in the room with her until she falls asleep. With her siblings we trained them by putting them to bed drowsy but awake and staying nearby reassuring them that they were okay and Mom and Dad were nearby. Each night we'd give our reassurances from a little farther away until we no longer came in the room, we'd just talk to them through the closed bedroom door. Eventually they didn't need that anymore. We started this when they were 6 months old or so which, I think, made it easier.We can only reassure our daughter by being in the room and signing to her. She has trouble falling asleep because she's constantly opening her eyes and looking around for us. Variations of the scream-it-out method don't work because she keeps waking her siblings. She has her lovey and favorite blanket as well as a dim nightlight but it's not enough, she needs one of her parents as well.We've explained to her that Mom and Dad are always nearby and will help her if she calls for us which does happen when a bad dream wakes her in the middle of the night. She still insists on someone being in the room while she falls asleep.My husband and I would be grateful for any suggestions on how to help our daughter fall asleep independently.TLDR: Our preferred and alternate sleep training methods haven't worked for our daughter, partly because she's deaf. We need new ideas. Help please! via /r/Parenting http://ift.tt/2iCadVe