[X] Summon as many Lesser Ghur Elementals as you can without it becoming tiresome, order them to protect the lightfangs, Cast Ygethmor's Fiery Blizzard at the Livgard, and then join the knights and attempt to punch through to the Shamans, leaving the Men-at-arms and Swordmasters to deal with the Livgard.
[X] Cast Ygethmor's Firey Blizzard at the Livgard, summon as many Lesser Ghur Elementals as you can and then join the knights and attempt to punch through to the Shamans, leaving the Men-at-arms and Swordmasters to deal with the Livgard.