Without her ability to displace and teleport, Saakir was not Jack's opponent. She was six levels higher than Jack, but Jack was able to go against multiple rare elites of the same level at the same time. So, fighting only one rare elite with a slightly higher level was not a problem for him.
Jack must admit, though. This Saakir was stronger than the average rare elite. Jack even had a feeling that she had a mana sense ability.
Even so, after a few clashes, Saakir was aware that she was not Jack's opponent. She wasn't able to keep Jack at bay. Jack was simply too fast. She had no problem concentrating in a melee but it was still very disadvantageous for her to fight in a melee.
Her expressions showed that she wanted to retreat but was unwilling to. She kept on glancing at the dim orb floating beside her. Jack was aware then that the orb might not follow her if she left. Perhaps because it was tethered to Luna at the center of this hall.