They Are Billions - Zombies Meet AOE

What wave? If you mean the Campaign, Rangers can if you build enough. It takes lots sure (my problem was I didn;t see the other wave and so while I was stopping one way off in the NW corner the other was rampaging through my base. And yes I had idle archers).

Wall structure is key. For diagonals, go 3 deep. For Straights, go 2deep. But you should have additional layers of walling beyond those. It will help give the archers time to kill.

e.g.

xx yy
xx yy
xx yy

1 or 2 spaces between the rows of walls. And you can do another layer (it will mean few archers can get hits in initially but every bit can help.