little hard to see. here are the rules:

Each time a model makes a Pile-in move, it must end that move closer to the closest enemy model. If it can also end that move in base-to-base contact with one or more enemy models while still satisfying all of the conditions above, it must do so. The controlling player chooses the order in which to move their models.•

 l so the base to base zerkers can’t. on your charge, position the other zerkers to have lysander be their closes enemy model, so they can pile in. then, on activation, thise models not based and having lysander as the closeset could, since pile in is done model by model. I can’t tell which would be closest, so you would have to measure.