I just practiced for procedures with FSX with PMDG 737.
When I had Assessment I went in few hours in actual Fixed Based Simulator 737 to handle the buttons and do as much as possible with checklists.
I had sim assessment not long ago, and raw data flying went pretty well, due to regular practice.
Further, try to find a sim company and try to get a job there as stand in partner for people who need sim partner for assessment prep or LPC.
Myself I also work in Sim company with 737, where I also practice so now and then some hours.
All Raw Data. No FD's, NO Auto Throttle etc.