HOLD 1 TO DISPELL BANISH STATUS ON ALL AFFECTED ENEMIES. THIS REMOVES ALL ENEMIES FROM THE RIFT.

Gameplay
Cast Cataclysm and Stasis over an area. To prevent enemies being stuck between the two planes at the edge of your slowly shrinking Cataclysm, cast Rift Surge and then hold 1 for Banish. This will unbanish the many rift-surged enemies inside your Cataclysm (who will then be immediately re-banished since they are still inside Cataclysm), triggering Rift Surge's AoE Banish up to 11m beyond the edge of your Cataclysm depending on how close a Rift Surged enemy is to the edge. At this point, you can cast Rift Surge to beneift from [Rift Torrent] bonus damage.

You can repeat this process of Rift Surge hold Banish to continue spreading your effective Banish range, but it's more effective to prevent the "can I shoot them or not" minigame that happens at the edges of Cataclysm.

If Stasis is ending, you can hold Banish to knockdown all affected enemies and recast Stasis before they stand back up. Enemies have no threat on [Limbo].
If you want to send all enemies out of the Rift, and have already used Rift Surge, hold Banish twice, to trigger Rift Surge's automatic AoE banish, then actually unbanish them.
Allies should fight with you from inside Cataclysm.

There is nothing you can effectively do to Overguard units. Ask nicely for help, or use a different frame.