As of early 2017, the mammoth now can carry wood at 12.5 weight per stack, which is now better than a beaver. Like so others may see

The mammoth already has a platform saddle in ark mobile but you have to buy the engram with real money. Click the up arrow if you want to help convince wildcard to add it into all versions of ark fully including ark mobile for free!!! Help start the petition revolution!!!!

It can spit water when submerged in a river/ocean and can remove paint from structures

A mammoth can FLY. Quetzal + Mammoth can gather thousands of wood in minutes. Attack while a tribe/alliance mate flys you though an area with trees

Mammoth needs a platform saddle!