... you will never be able to shove one player into another. I
learned this real quick with my old Empire warriors. You can
shove a player into any non-pc though, and it works well, and
you can spam it with zero lag so unless you're getting tripped
or bashed, you'll get them

Ideal uses for shove:
1) You're ranking, people come to attack you, shove them into
the mob.
2) You're fighting a druid, push them into their cotw pet and
treant.
3) You're fighting a conjurer, nuff said.
4) Necro's, to some extent, though they got a lot of less
damaging creatures so it takes awhile to get them tanking their
entire flock.

And probably the best use for shove, which I used to do
sparingly...
4) You're raiding, shove 'villager'. Then he has to deal with
all the flurries and crap from the destructor.

Dunno if the conjurer and fighting the inner guardians still
worked, but if they do, its awesome.

I'm extremely surprised you hadn't figured this out, because
shove is nice.

- Kazadan