Spoilers, kind of.
To have the highest odds of beating the current record (presently held by me) you will need the following stats:
14 or 25 vit
9 or 13 str
the rest into dex
Me and that ":3" guy seem to be the only ones in high ladder, maybe this way competition raises a bit and the dev realizes how broken, opaque and high variance the system is.
Im not sure if this is getting enough players (it probably still gets some since ":3" beat my previous record this week), but in case it does, the hidden boss could also be beaten legitimately after enough tries.