Actually, Abel wasn't all that worried about the three spiritual guardian knights. The King of Darkness was not going to just break through their bodies and the Duriel armor that easily. He had all the time he needed to use up the full recovery potion, so the goal was to just keep providing back support until the opponent went down. He had used three bottles of the full recovery potion in a couple of seconds. Such expenditure was only possible with Abel's Horadric Cube.
In a place that's further away, nine spiritual guardian wizards continued to cast their aggressive spells at the King of Darkness.
"Lightning chain." Blizzard." Firewall."
Since the lightning attacks didn't work against the committee members, Abel decided to use them outside the range of the "sacred freezing" just to make sure that it was safe.