Repostin in new thread, Crit Draw GS is now pretty strong. Here's the build I made in two variants, both work really well.
It doesn't do exactly the same damage as a regular build, but it's very close and makes the fights much easier.
With Adrenaline, Razor's Edge, Agitator, Peak Performance and demon seed I had 324 raw.
Adrenaline Rush lasts 1 minute, Razor's Edge adds 15s, they are super easy to keep up.

Tested it against some 8* tempereds, 5 stars, solo with no cat
>15 mins for Gore
>14 mins for Lagia
>9 mins for Steve
>9 mins for AT Rey
>7 mins for Mizu