[4e] Super Glaive combo?

[Oracle_Hunter]

1) Polearm Gambit + Tide of Iron is "incredibly broken"?

It runs like this:
1) NPC steps adjacent to Fighter, triggering Polearm Gambit (+WIS to hit, 'cause of Combat Superiority)
2) Fighter hits, uses Tide of Iron to move NPC back one square. NPC's movement is ended because of Combat Superiority.
3) Next turn, the NPC can try to move past again... rinse and repeat.

This converts a Fighter from road-bump into a brick wall - nothing can get past him without taking the long way around. If the Fighter is in a choke point (15 feet across), absolutely nothing can get around him.

While this isn't Divine Miracle levels of broken, it is unreasonably strong for a two-feat combo.