The one cardinal choice will still betray you towards end game. With greater shield, chant of protection, counter critical, freezing/blazing skin and maybe valor, top nuker parties will still be able to lengthen the fight long enough to leave you without mana or simply cancel - fear your only cleanser, to death. At which moment you will be forced to switch to a 2 cardinals setup. Once there, you'll realize that a HK exceeds the SLH's cancel abilities by far, while providing better mana consumption, better durability and survivability. At which point, if you happen to be really active, have capable players in CP and also benefit from the support of a strong clan, one more epiphany will strike you - that you can change one TR for a SR and strive towards making it hero. What will that achieve? Well... fix solve some mobility issues for your HK and provide you with the other triggers and inherent benefits of a fighter hero.