You don't need a turbo scavenge stage unless
Your turbo position is very low in which case
Gravity draining from the turbo can be a issue

You can drain into the side of the pan
Or even near the scavenge tube on the dry sump
Pan

I do the opi dry sump kits
If you have a google at some pics or go
On Burton's site you will see the turbo drain in the
Side of the pan