dice are d600, roll low to hit/crit/effect
Step 1:

skull bash wind up
+1def (2t)

double slap
-4 en
479 hit yes
404, hits 2
90, 294 crits no
(2 + 4 - 7) - 3 = 1....
2 = 2
skull bash is canceled
Step 2:

skull bash wind up
+1def (2t)

double slap
-4 en
216 hit yes
107, hits 4
342, 327, 104, 32 crits no
(2 + 4 - 7) - 3 = 1....
2 * 3 = 6
skull bash is canceled
Step 3:

skull bash wind up
+1def (2t)

reflect
-10 en
create barrier for 7s
skull bash
-8 en
366 crit no
(13 + 7 + 3 - 12) = 11 damage