Their pact attacks were already downgraded years ago. They are nowhere near as strong as a true attack if you were to try to kill a Demon Lord. They hurt, but are entirely survivable with the proper preparation.

11458h, 7590m, 6000e, 10p, 29398en, 32400w elrxk<>-
pact ashtorath

You prostrate yourself before Ashtorath, and profess your commitment to hatred
and rage, begging the Duke of Inescapable Damnation to form a pact with you. You
are slammed to the ground by one of his huge, horned hands.
11458h, 7590m, 6000e, 0p, 29400en, 32400w lrxk<>-

Ashtorath the Raging exclaims, "You better serve me well, Malarious! I will
tolerate nothing else! Rage against the Light! Hate all life and let your fury
rule your being. Together, our rage shall flatten all opposition!"
11458h, 7590m, 6000e, 0p, 29400en, 32400w lrxk<>-

With a howl of rage, Ashtorath the Raging backhands you, knocking you backwards
with his huge knuckles. You fly backwards as your skin erupts in flames and you
scream in agony.
3484h, 7590m, 6000e, 0p, 29400en, 32400w lrxkp<>-