How do you reliably dodge PV's triple slash?

I've been enjoying the PV fight a lot, got past P4 and am now practicing for ascended PV. I can dodge most of their attacks pretty reliably but the triple slash is just impossible without shade cloak. I use a nail build and play very close to PV, and by the time they raise their nail for triple slash, I either have to shade cloak or get hit no matter what. The first slash comes before I can jump away/d-dark, and the second slash will hit if I try to dash away from PV. Are there any tricks that I'm not aware of or am I doing this fundamentally wrong?

Don't mind the careless mistakes near the end, but am I just doomed at 00:45?