Eric S. Raymond wrote some comments about this scenario on his webpage.
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This first scenario is a fairly straightforward power-vs.-maneuverability confrontation. If the Syracusan general can bring his heavy infantry to bear squarely against the opposing line, he will win. The Carthaginian must maneuver and hope to pick off five Syracusan light units before that happens.
I think the advantage is slightly with the Syracusans in this senario. Their missile troops have better range, which tends to prevent the Carthaginian skirmishers from doing much to disrupt the Syracusan heavies. And the only real mobile striking force Carthage has is the chariot and light-cavalry pair on his extreme left; a flank attack against the Syracusan right is thus about the only way Carthage has to secure the initiative. If that fails and the Syracusan makes no large exploitable errors afterward, he's got a lock.
This scenario could be rebalanced by giving the Carthaginians 6command cards rather than 5.