Went down in the depth with my lvl 440 imprinted Basilo equipped with ascendent saddle. Fought a lvl 110 alpha mosa with 160k HP in a head on fight (aka standing still and holding down attack). Killed it in about a minute, and my Basilo lost just 1k out of 70k HP.

A high lvl imprinted one with a good saddle is completely OP, takes a while to breed and raise tho.