Everyone stand on my side of the mob and push!

[Troxx]

It is just sheer speed and volume of hits that helps push. Str, attack buffs and relative level will help only insofar as all of these things help more swings to hit. How hard you hit does not matter.

Soloing a spectral curate on my monk:
-IFS (38/40) with worn and epic click haste the curate will complete heal 2-3x before running out and I can kill him.
-epic/SoS he will still reliably channel through compete heal at least once, but usually will still heal 2-3x
-epic/epic (double 9/16 with worn and epic click haste I will interrupt him 90% of the time. If it's a green curate or I have a good strength buff to buffer my attack, I'll interrupt him pretty much every time.

It all boils down to how many hits there are over a period of time (hits mind you ... Not just swings.