If a T-Rex animal companion has Greater Grapple and Rapid Grappler, what could it do with the swift action? I'm assuming it would not have the finesse required to tie up a foe, so I'm not sure what there is left for the Rapid Grappler swift action to be used for.
Chain of events:
- Standard action Grapple (grapple foe)
- Move action Greater Grapple (pin foe)
- Swift action Rapid Grappler (tie up foe?) ← what are a T-Rex's options?