What is the test for determining prejudice against a convicted rapist who has a criminal record of multiple sexual assaults and violent attacks?

criminal record of multiple sexual assaults and violent attacks, including repeatedly raping a kidnapped 13-year-old girl. See Wiggins v. Smith , 539 U.S. 510, 534, 123 S.Ct. 2527, 156 L.Ed.2d 471 (2003) ("In assessing prejudice, we reweigh the evidence in aggravation against the totality of available mitigating evidence."); see also Wong v. Belmontes , 558 U.S. 15, 26, 130 S.Ct. 383, 175 L.Ed.2d 328 (2009) (per curiam) (holding in a capital case that there was no prejudice due to counsel's failure to introduce more mitigating evidence because the aggravating evidence was "simply overwhelming" (citation omitted)).