1 should be plenty. That’s a lot of blow by for such small displacement if you really needed 2
You should have a bung on the turbo inlet to suck the gasses out of the crank case and supply some vacuum. IMO
The drop in power from slightly contaminated intake air would be made up for with better ring seal.
Honda spent a lot of time designing a very positive crank case evac system and everyones first mod is to bypass it with a cold air intake and a stupid breather filter. It kills me!