Push attack of party

[Tonari]

I think that it makes push attack of party so that some of monster of DM2 may do.
I tried to make it from generation of spell of push in front of party at same time as attacking monster.
It works correctly when character attacks monster.

However, it has been understood that monster can do in push even when attack of character doesn't reach monster. (When character is in the rear rank)
I want to make attack method that does monster in push only when attack of character reaches monster.

Is this method of someone devised?