I cannot emphasise this enough.

As a Savage raider, the mounts aren't worth trying to get on-content, especially as a pity system doesn't exist for them outside of the usual 'unregistrable' restriction.

Unless you have the drive and motivation to clear the Savage tier, and thus receive the mount as a side benefit of doing so, then I'd advise waiting it out. Even in 6.0-ish, Eden's Promise: Eternity was significantly easier with a full group, and many mechanics could be outright skipped.