Powerfull studio strobe for HSS???

I am currently using Paul C Buff Einstein strobe for on-location wedding stuff. But it only lets me sync at 1/200 and I am really tired of using powerfull ND filters for low DOF shots. I use a tripod and liveview for focusing, but with the ND filters the screen gets very dark.

I know my speedlites do high-speed sync and I even have PW TT5's, but they really dont have much power in HSS mode.

Is anyone using powerfull (600Ws+) strobes that is able to sync at fast shutter speeds?