I'd recommend you read 'dont go there' https://www.amazon.com/DONT-GO-THERE-mystery-Dyatlov-ebook/dp/B00V5B3PI2, excellent book by a russian journalist who's been following the case for years. I think she has a superior explanation, but the whole book is good.
The book 1079 is an excellent resource. Possibly the most thorough in terms of collecting and sorting through all the confusing facts. Not a quick read--expect to go pretty deep. Their conclusion seems plausible to me, and not one that is often considered.
You should check out Svetlana Oss's book - it's really good. Don't want to ruin it for you, but Mansi + fly agaric = plausible/possible.