Comments:

First

With the relay circuit you sent, just make sure you understand it because I see it's for an AC load
iso latch out as a signal controls Q1 and Q2 so you're right in that we won't need it, but you'll need some control signal for the relays
For the relay part search, it looks like one of the models you sent has a load voltage rating of 40V, we need at least 150V. Also, I forget how much current will be running through it but check peak load current as well. We finish precharge before the capacitor voltage is at 150V so there will be current.
Again for hall effect sensors just check your ratings. I think both the ones you listed are fine but double-check.
One more thing, one of your current sensors takes a 5V supply. If you find you have a few components that need that you should probably find a regulator

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