Melchia

Without saying a word, without dropping his crossbow, Melchia moves up next to Rubido. He concentrates, and suddenly his eyes flash with a brief silvery light. The air seems to ripple in front of him, in a half-seen cone emanating from his forehead, enveloping the two attackers. Silently, he tries to convince their minds that they've sustained grievous injury...

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Moving to O-8, then expending psionic focus to take 15 on a Concentration check to manifest a power defensively, for a final total of 21, making the DC 16 easily.
Manifesting Disable, aiming the 20 ft. cone to effect the enemies and not Rubido. The enemies must make a DC 15 Will save or believe they have been disabled, as long as they have 4 HD or less, for 1 minute.