Translation of "go at" into Spanish

Is that the way them big-shot lawyers go at a case?

¿Así es como esos abogados importantes acometen un caso?

They seem to be going at you all the time.

Parece como si te atacaran todo el tiempo.

You know, one time when Kyle and I were kids, we saw two tunnel trolls go at it over a can of stewed tomatoes.

Mira, una vez, cuando Kyle y yo éramos niños, vimos a dos habitantes de los túneles lanzarse sobre una lata de tomates.