Use the following trick to easily defeat any of the large enemies that
require you to jump on their backs and get hits. Use Slow (tap L1) when
you are climbing up its back. Once you get up there, start hitting it as
much as possible. Eventually, before time runs out or it has the chance
to throw you off its back, you will be able to stab it in the neck and
it will fall. By doing this, you will only use one Sand Tank and it will
be refilled by its death. Note: Do not use any other Sand Tanks prior to
jumping on its back, or else you will waste them and not get them back
too quickly. *Note:* You may have to use two Sand Tanks while on its
back if it is used too early.

When you are on a cliff or platform with areas to fall off and enemies
start attacking in groups, just throw them off instead of wasting Sand
Tanks or fighting them all head on. This saves time, especially when you
reach The Cliff as the Sandwraith.