Lucy Spell Details reveal the push back caused by spell casts. A 'pushback' of 1 will move a mob 1 ft in-game.

Click on the spell to be directed to the referenced lucy spell info:

Voidfrost Lure Rk. III: Pushback=0
Tears of the Pyrilen Rk. III: Pushback=0
Concussive Flash Rk. III: Pushback=0
Wildmagic Blast Rk. III: Pushback=0
Pure Wildmagic Rk. III: Pushback=0
Chaos Combustion Rk. III: Pushback=0
Claw of Gorenaire Rk. III: Pushback=0
Talendor's Presence Rk. III: Pushback=0
Cloudburst Levin Rk. III: Pushback=0
Leap of Static Jolts Rk. III: Pushback=0
Mindfreeze Rk. III: Pushback=0
Mindfreeze Strike: Pushback=0
Flarelure Rk. III: Pushback=0
Leap of Lightning Sprites Rk. III: Pushback=0
Ribbon Lightning Rk. III: Pushback=0
Gelid Snap Rk. III: Pushback=0
Funnel of Frigidity Rk. III: Pushback=0
Magmatic Eruption Rk. III: Pushback=0
Icesheet Cascade Rk. III: Pushback=0
Flashblaze Rk. III: Pushback=0
Ethereal Iceblight Rk. III: Pushback=0
Malediction of Havoc Rk. III: Pushback=0
Ethereal Combustion Rk. III: Pushback=0
Telajara Rk. III: Pushback=0
Icicle Torrent Rk. III: Pushback=0
Klixcxyk's Fire Rk. III: Pushback=0
Thricewoven Energy Rk. III: Pushback=0
Self-Immolation Rk. III: Pushback=0
Splash of Brimstone Rk. III: Pushback=0

we have a AA spell now " Beam of Displacment" - it would be used just to move a mob (or mobs) - it is a beam spell (so more then one would be impacted - based on the direction we are facing). it has a pushback of 18

The other pushback spell we have is "thunderclap" level 30 (yep level 30) with a pushback of 10. We used it on raids in PoP to help position mobs that we were range fighting.

Thanks Zorais for the lookup on wizards nukes. So for the most part - non of our normal line up at 85 would do any pushback, with the exception of our sword/swarm pets.