unfortunately there is no Greek text of Plutarch's Life of Crassus online that I can find. A more modern translation has:

But, nevertheless, Cassius once more had a conference with Crassus, and advised him above all things to recuperate his forces in one of the garrisoned cities, until he should get some sure information about the enemy; but if not this, then to advance to Seleucia along the river. For in this way the transports would keep them abundantly supplied with provisions by putting in at their successive encampments, and, by having the river to prevent their being surrounded, they would always fight their enemies on even terms and face to face.

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Bingley

Bingley