I updated the file with the roster for the merc player and an AAR of our scenario.
Lorenzo tried hard to get past my units, and the need to comply with Zellbrigen limited my chances of thinning his ranks from the distance.
As I crippled a few units however (forcing them to retreat), and increased my firing options to deal with dishonorable mercenaries who were not behaving properly on the battlefield, I managed to eliminate several 'Mechs. I lost a point of Elementals and could not stop the two Kuritan units, but in the end it was a decisive victory for the Jaguars. The fight ended when my Shadow Cat B challenged the last remaining opponent, a MAD-3M, which politely (and wisely) declined. The key to victory was taking advantage of higher TMM, good terrain, range and the rain to survive a large number of almost impossible shots, while my units slowly but consistently damaged the less mobile IS 'Mechs. Which is probably what a savvy outnumbered Star Captain should do, anyway.