there's a counter for everything, even imperial bards, fortlander gangs, and drow aps with 100+ charge whips.
doesn't stop them from being difficult to deal with.
I can foresee several situations where that whip/sword warrior can counter the effects of STSF/maledict combos, but I can also see several situations where that STSF/maledictor counters his counter-tactics, etc.
Simplified, assuming that neither took several edges/legacies designed specifically to counter each other's build, and that their equipment/preps aren't ridiculously crazy. I am stating what would happen and why I believe he was wrong.